• Tutorial-Recode and Compute Variables in SPSS

    Learn how to recode variables and compute and index variable using SPSS.

    published: 26 Feb 2013
  • Excel Magic Trick 781: Three Way Lookup: INDEX and MATCH and Concatenated Ranges & Cells

    Download file: https://people.highline.edu/mgirvin/ExcelIsFun.htm 1. See how to do a three way lookup when there are two row header variables (criteria) and one column header (criteria) variable using INDEX and MATCH functions for a normal two way lookup, but with the two row headers joined to create a single row header criteria. In essence, three way lookup is turned into a standard two way lookup. Also see IFERROR function.

    published: 21 May 2011
  • NCLab Turtle Coding: Index Variables

    Learn how to draw patterns such as a maze or vortex with NCLab Turtle, using for loops and modifying the counting or index variables. Set beginning and ending values for the index, write operations on the index within the body of the for loop. TURTLE CODING COURSE: LEARN PROGRAMMING THROUGH ART The Turtle Coding course is an excellent visual introduction to Python programming. Students create beautiful objects including pendants, mosaics, ornaments, cookie cutters, round containers, vases and even chess figures. Their creations can be printed on 3D printers and cut out of wood or plastic on laser cutters. While writing programs for the Turtle, students become proficient in using variables, loops and functions as well as in Python code syntax, formatting and debugging. The course require...

    published: 19 Jan 2017
  • spreadsheet basics (MATCH AND INDEX WITH 3 VARIABLES)

    match and index tutorial. These 2 functions are very often used together in place of vlookup. This example looks up IRS witholding for (1) wages, (2) marital status, and (3) number of deductions. 2 and 3 are combined in a single table (M2, S0, S3, etc.)

    published: 08 Feb 2011
  • Index Laws using variables

    published: 19 Jun 2017
  • Indexes & Scales

    Let's go on a journey and learn about indexes and scales as a way of measurement in research!

    published: 20 Mar 2014
  • L3.1 - Introduction to optimal control: motivation, optimal costs, optimization variables

    Introduction to optimal control within a course on "Optimal and Robust Control" (B3M35ORR, BE3M35ORR) given at Faculty of Electrical Engineering, Czech Technical University in Prague. Motivation for optimal control; formulation of optimal control criterion (aka cost function, performance index); identification of optimization variables (either controller parameters or control signals).

    published: 08 Mar 2017
  • rationalizing the denominator of a higher index radical with variables.wmv

    published: 15 Apr 2012
  • Mean E(X) and Variance Var(X) for Continuous Random Variables : ExamSolutions

    Go to http://www.examsolutions.net/maths-revision/index.php to see the main index of maths video tutorials

    published: 10 Dec 2009
  • Distinction between real and nominal variables, price index numbers (ECO)

    Subject: Economics Paper: Basic Macroeconomics Module: Distinction between real and nominal variables, price index numbers Content Writer: Ms. Archana Aggarwal

    published: 18 Nov 2015
  • Algebra 2 - Exponents

    Big crossover topic from Algebra 1 to Algebra 2, on exponents. Here we multiply exponents, divide exponents, and raise them to powers. I hope this video can improve your abilities, exponentially! YAY MATH! Please visit yaymath.org Videos copyright © Yay Math For all videos, free quizzes, worksheets, Yay Math's book on inspired education, and entire courses you can download, please visit yaymath.org

    published: 26 Feb 2013
  • Exponent rules part 1 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

    Introduction to exponent rules Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/e/exponent_rules?utm_source=YTdescription&utm_medium=YTdescription&utm_campaign=YTdescription Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/exponent-properties/v/exponent-rules-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/pre-algebra/exponents-radicals/cube-root-tutorial/v/simplifying-radical-expressions1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airpl...

    published: 27 Jan 2007
  • How to Calculate a Correlation Matrix in Excel (Three or More Variables)

    Check out our brand-new Excel Statistics Text: https://www.amazon.com/dp/B076FNTZCV This video illustrates how to calculate a correlation in Excel on three variables using the Data Analysis Toolpak. YouTube Channel: https://www.youtube.com/user/statisticsinstructor Correlation in Excel Data Analysis ToolPak Pearson Correlation in Microsoft Excel Video Transcript: In this video I want to take a look at how to calculate the correlation coefficient in Microsoft Excel when I have more than two variables. So in this example I have SAT score, social support and this was recorded in college, and then college GPA. So we have three variables and what I want to do is get the correlation between all pairs of variables. So the correlation of SAT with social support, the correlation of SAT with co...

    published: 30 Sep 2014
  • Lookup data using multiple conditions

    Learn Excel online https://www.udemy.com/excel-2010-superhero-course/?couponCode=Excel2010YouTube Lookup data using multiple conditions in Excel. Use the Index and Match functions in an array formula to lookup data using multiple conditions. VISIT COMPUTERGAGA FOR LOTS MORE TIPS http://www.computergaga.com CONNECT WITH US! Google+ ► https://plus.google.com/+Computergaga Facebook ► http://www.facebook.com/computergaga Twitter ► http://www.twitter.com/computergaga1

    published: 05 Jul 2011
  • 26 Script controller index and count variables

    published: 17 Apr 2010
  • SPSS for newbies:adding variables to make scores from questionnaire data

    Very often students who have questionnaire data ask me whether they can add together some similar variables to create a new variable that summarizes the meaning of all the questions that go into it, for example if you have a load of questions about the service of an airline, the sum of those questions gives a new variable that may be interpreted as airline satisfaction score. The answers is YES (that new variable is called a score/index), but there are things to watch out for. Keywords: index, composite score, attribute, trait, items, unit weighted scores, weighted scores, reliability, MEAN().

    published: 18 Dec 2014
  • Differential Equations (1) - Variables Separable : ExamSolutions

    Go to http://www.examsolutions.co.uk to see the full index, playlists and more videos on differential equations, calculus and other maths topics

    published: 24 Sep 2012
  • Applying Index Laws to Variables

    Applying Index Laws to Variables

    published: 10 Oct 2017
  • MPA Stats Plugin 4-Standardizing variables and creating an index

    This video describes how to standardize variables (converting variables into z-scores based on a standard normal distribution) and how to create an index score from variables on different scales (3:27). This video includes a brief reminder of how to read the exponential notation sometimes used by R (at 4:30).

    published: 20 Feb 2015
  • How to Use SPSS: Factor Analysis (Principal Component Analysis)

    Determining the efficiency of a number of variables in their ability to measure a single construct. Link to Monte Carlo calculator: http://www.allenandunwin.com/spss4/further_resources.html Download the file titled MonteCarloPA.zip.

    published: 28 May 2013
  • PHP Tutorial for Beginners 17 # Using $_GET Variables in PHP

    get - PHP $_GET Variable php - How to set $_GET variable PHP - easiest way to get $_GET parameters string as written PHP: $_GET php $_request php $_get array php $_get example php isset php $_get undefined index php $_get not working php $_get multiple values php $_get empty Verwandte Suchanfragen zu php $_GET php $_get auslesen php get url php $_get array php $_get undefined index php $_get empty php $_get page php $_get leer php $_get absichern

    published: 06 Aug 2014
  • Simplifying Radicals any index and variables

    published: 27 Oct 2017
  • Differential Equations (3) - Variables Separable : ExamSolutions

    Go to http://www.examsolutions.co.uk to see the full index, playlists and more maths videos on differential equations and other maths topics

    published: 26 Sep 2012
  • Simplifying Radicals of Index 2: Radicand Contains Variables

    published: 10 Sep 2011
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Tutorial-Recode and Compute Variables in SPSS

Tutorial-Recode and Compute Variables in SPSS

  • Order:
  • Duration: 8:43
  • Updated: 26 Feb 2013
  • views: 32389
videos
Learn how to recode variables and compute and index variable using SPSS.
https://wn.com/Tutorial_Recode_And_Compute_Variables_In_Spss
Excel Magic Trick 781: Three Way Lookup: INDEX and MATCH and Concatenated Ranges & Cells

Excel Magic Trick 781: Three Way Lookup: INDEX and MATCH and Concatenated Ranges & Cells

  • Order:
  • Duration: 7:23
  • Updated: 21 May 2011
  • views: 264315
videos
Download file: https://people.highline.edu/mgirvin/ExcelIsFun.htm 1. See how to do a three way lookup when there are two row header variables (criteria) and one column header (criteria) variable using INDEX and MATCH functions for a normal two way lookup, but with the two row headers joined to create a single row header criteria. In essence, three way lookup is turned into a standard two way lookup. Also see IFERROR function.
https://wn.com/Excel_Magic_Trick_781_Three_Way_Lookup_Index_And_Match_And_Concatenated_Ranges_Cells
NCLab Turtle Coding: Index Variables

NCLab Turtle Coding: Index Variables

  • Order:
  • Duration: 2:49
  • Updated: 19 Jan 2017
  • views: 205
videos
Learn how to draw patterns such as a maze or vortex with NCLab Turtle, using for loops and modifying the counting or index variables. Set beginning and ending values for the index, write operations on the index within the body of the for loop. TURTLE CODING COURSE: LEARN PROGRAMMING THROUGH ART The Turtle Coding course is an excellent visual introduction to Python programming. Students create beautiful objects including pendants, mosaics, ornaments, cookie cutters, round containers, vases and even chess figures. Their creations can be printed on 3D printers and cut out of wood or plastic on laser cutters. While writing programs for the Turtle, students become proficient in using variables, loops and functions as well as in Python code syntax, formatting and debugging. The course requires the knowledge of elementary geometry including angles, lengths, polygons, circles and arcs, therefore the recommended minimum age is 11 years. There is no upper age limit and there are many adults and lifelong learners who enjoy the course as K-12 students do.
https://wn.com/Nclab_Turtle_Coding_Index_Variables
spreadsheet basics (MATCH AND INDEX WITH 3 VARIABLES)

spreadsheet basics (MATCH AND INDEX WITH 3 VARIABLES)

  • Order:
  • Duration: 21:04
  • Updated: 08 Feb 2011
  • views: 4651
videos
match and index tutorial. These 2 functions are very often used together in place of vlookup. This example looks up IRS witholding for (1) wages, (2) marital status, and (3) number of deductions. 2 and 3 are combined in a single table (M2, S0, S3, etc.)
https://wn.com/Spreadsheet_Basics_(Match_And_Index_With_3_Variables)
Index Laws using variables

Index Laws using variables

  • Order:
  • Duration: 8:10
  • Updated: 19 Jun 2017
  • views: 10
videos
https://wn.com/Index_Laws_Using_Variables
Indexes & Scales

Indexes & Scales

  • Order:
  • Duration: 7:50
  • Updated: 20 Mar 2014
  • views: 11298
videos
Let's go on a journey and learn about indexes and scales as a way of measurement in research!
https://wn.com/Indexes_Scales
L3.1 - Introduction to optimal control: motivation, optimal costs, optimization variables

L3.1 - Introduction to optimal control: motivation, optimal costs, optimization variables

  • Order:
  • Duration: 8:54
  • Updated: 08 Mar 2017
  • views: 4189
videos
Introduction to optimal control within a course on "Optimal and Robust Control" (B3M35ORR, BE3M35ORR) given at Faculty of Electrical Engineering, Czech Technical University in Prague. Motivation for optimal control; formulation of optimal control criterion (aka cost function, performance index); identification of optimization variables (either controller parameters or control signals).
https://wn.com/L3.1_Introduction_To_Optimal_Control_Motivation,_Optimal_Costs,_Optimization_Variables
rationalizing the denominator of a higher index radical with variables.wmv

rationalizing the denominator of a higher index radical with variables.wmv

  • Order:
  • Duration: 12:11
  • Updated: 15 Apr 2012
  • views: 9448
videos
https://wn.com/Rationalizing_The_Denominator_Of_A_Higher_Index_Radical_With_Variables.Wmv
Mean E(X) and Variance Var(X) for Continuous Random Variables : ExamSolutions

Mean E(X) and Variance Var(X) for Continuous Random Variables : ExamSolutions

  • Order:
  • Duration: 8:34
  • Updated: 10 Dec 2009
  • views: 75100
videos
Go to http://www.examsolutions.net/maths-revision/index.php to see the main index of maths video tutorials
https://wn.com/Mean_E(X)_And_Variance_Var(X)_For_Continuous_Random_Variables_Examsolutions
Distinction between real and nominal variables, price index numbers (ECO)

Distinction between real and nominal variables, price index numbers (ECO)

  • Order:
  • Duration: 29:10
  • Updated: 18 Nov 2015
  • views: 215
videos
Subject: Economics Paper: Basic Macroeconomics Module: Distinction between real and nominal variables, price index numbers Content Writer: Ms. Archana Aggarwal
https://wn.com/Distinction_Between_Real_And_Nominal_Variables,_Price_Index_Numbers_(Eco)
Algebra 2 - Exponents

Algebra 2 - Exponents

  • Order:
  • Duration: 20:35
  • Updated: 26 Feb 2013
  • views: 514340
videos
Big crossover topic from Algebra 1 to Algebra 2, on exponents. Here we multiply exponents, divide exponents, and raise them to powers. I hope this video can improve your abilities, exponentially! YAY MATH! Please visit yaymath.org Videos copyright © Yay Math For all videos, free quizzes, worksheets, Yay Math's book on inspired education, and entire courses you can download, please visit yaymath.org
https://wn.com/Algebra_2_Exponents
Exponent rules part 1 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

Exponent rules part 1 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

  • Order:
  • Duration: 9:43
  • Updated: 27 Jan 2007
  • views: 1120398
videos
Introduction to exponent rules Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/e/exponent_rules?utm_source=YTdescription&utm_medium=YTdescription&utm_campaign=YTdescription Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/exponents-radicals/exponent-properties/v/exponent-rules-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/math/pre-algebra/exponents-radicals/cube-root-tutorial/v/simplifying-radical-expressions1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to KhanAcademy’s Pre-Algebra channel:: https://www.youtube.com/channel/UCIMlYkATtXOFswVoCZN7nAA?sub_confirmation=1 Subscribe to KhanAcademy: https://www.youtube.com/subscription_center?add_user=khanacademy
https://wn.com/Exponent_Rules_Part_1_|_Exponents,_Radicals,_And_Scientific_Notation_|_Pre_Algebra_|_Khan_Academy
How to Calculate a Correlation Matrix in Excel (Three or More Variables)

How to Calculate a Correlation Matrix in Excel (Three or More Variables)

  • Order:
  • Duration: 4:33
  • Updated: 30 Sep 2014
  • views: 62887
videos
Check out our brand-new Excel Statistics Text: https://www.amazon.com/dp/B076FNTZCV This video illustrates how to calculate a correlation in Excel on three variables using the Data Analysis Toolpak. YouTube Channel: https://www.youtube.com/user/statisticsinstructor Correlation in Excel Data Analysis ToolPak Pearson Correlation in Microsoft Excel Video Transcript: In this video I want to take a look at how to calculate the correlation coefficient in Microsoft Excel when I have more than two variables. So in this example I have SAT score, social support and this was recorded in college, and then college GPA. So we have three variables and what I want to do is get the correlation between all pairs of variables. So the correlation of SAT with social support, the correlation of SAT with college GPA, and then the correlation of social support with college GPA. So to do that I want to go ahead and select Data and then Data Analysis and then when this window opens up I want to go to Correlation and then click OK. Now here I need to select the area of my variables and it's already selected here but let's go ahead and redo that. So start with the first label SAT score and scroll all the way down until we have all the data selected. Notice that says B1 through D31 so those are all the cells that are of interest. And then notice that I've gone ahead and selected my labels which I wanted to do so I want to make sure I check this box Labels in First Row and then notice it says Grouped by Columns and that's right each variable is in a separate column so that looks great so let's go ahead and click OK. And it opens up the results in a new worksheet. I'm going to go ahead and expand these columns by double-clicking on them so we can see the information better here and then I'll also go ahead and dial down these decimal places here and we'll just take them to two decimal places. OK now I'm going to highlight the correlation coefficients so they're easier to see. And then let's go ahead and make this font a little larger as well so it's easier to see and I'll have to re- expand just a bit more. OK so these are our correlation results and notice here I have SAT Score, Social Support, and College GPA and here where a column intersects with a row that indicates the correlation. So the correlation .03 is the correlation or relationship between the SAT score and social support and that's very small. And then SAT correlates with college GPA .62 which is much higher that's a pretty strong correlation. And then finally social support correlates with college GPA .35. Now in this video what we're looking at when we're calculating the Pearson correlation coefficient which is what this is. When we run this analysis in Excel we get these correlation coefficients output it's important to note here that all we're getting is the descriptive statistic or the correlation between the two variables. But we haven't tested these for statistical significance. So while we know that the correlation here between college GPA and SAT scores .62 we don't know for certain at this point whether that correlation is significantly different from zero. It probably is just from experience here but we don't know that by looking at this alone and we don't know for example is .35 statistically significant this correlation between social support and college GPA. We can't tell that from this analysis. To know that we need to run another procedure in Excel which I've done in another video which I'll link to in this video for those who are interested. But it is important to be aware of here that running this procedure while definitely worthwhile it doesn't state whether a given correlation is statistically significant or not. So in other words we don't know whether this .35 is significantly different from zero or no relationship. We need to establish that by conducting a hypothesis test and unfortunately in Microsoft Excel it doesn't come out automatically when you run the correlation procedure but instead we need to run a different analysis. OK that's it for running the Pearson correlation for multiple variables in Microsoft Excel. Thanks for watching. YouTube Channel: https://www.youtube.com/user/statisticsinstructor Subscribe today!
https://wn.com/How_To_Calculate_A_Correlation_Matrix_In_Excel_(Three_Or_More_Variables)
Lookup data using multiple conditions

Lookup data using multiple conditions

  • Order:
  • Duration: 7:31
  • Updated: 05 Jul 2011
  • views: 166430
videos
Learn Excel online https://www.udemy.com/excel-2010-superhero-course/?couponCode=Excel2010YouTube Lookup data using multiple conditions in Excel. Use the Index and Match functions in an array formula to lookup data using multiple conditions. VISIT COMPUTERGAGA FOR LOTS MORE TIPS http://www.computergaga.com CONNECT WITH US! Google+ ► https://plus.google.com/+Computergaga Facebook ► http://www.facebook.com/computergaga Twitter ► http://www.twitter.com/computergaga1
https://wn.com/Lookup_Data_Using_Multiple_Conditions
26 Script controller index and count variables

26 Script controller index and count variables

  • Order:
  • Duration: 4:25
  • Updated: 17 Apr 2010
  • views: 3025
videos
https://wn.com/26_Script_Controller_Index_And_Count_Variables
SPSS for newbies:adding variables to make scores from questionnaire data

SPSS for newbies:adding variables to make scores from questionnaire data

  • Order:
  • Duration: 19:22
  • Updated: 18 Dec 2014
  • views: 11631
videos
Very often students who have questionnaire data ask me whether they can add together some similar variables to create a new variable that summarizes the meaning of all the questions that go into it, for example if you have a load of questions about the service of an airline, the sum of those questions gives a new variable that may be interpreted as airline satisfaction score. The answers is YES (that new variable is called a score/index), but there are things to watch out for. Keywords: index, composite score, attribute, trait, items, unit weighted scores, weighted scores, reliability, MEAN().
https://wn.com/Spss_For_Newbies_Adding_Variables_To_Make_Scores_From_Questionnaire_Data
Differential Equations (1) - Variables Separable : ExamSolutions

Differential Equations (1) - Variables Separable : ExamSolutions

  • Order:
  • Duration: 14:40
  • Updated: 24 Sep 2012
  • views: 136374
videos
Go to http://www.examsolutions.co.uk to see the full index, playlists and more videos on differential equations, calculus and other maths topics
https://wn.com/Differential_Equations_(1)_Variables_Separable_Examsolutions
Applying Index Laws to Variables

Applying Index Laws to Variables

  • Order:
  • Duration: 1:21
  • Updated: 10 Oct 2017
  • views: 5
videos
Applying Index Laws to Variables
https://wn.com/Applying_Index_Laws_To_Variables
MPA Stats Plugin 4-Standardizing variables and creating an index

MPA Stats Plugin 4-Standardizing variables and creating an index

  • Order:
  • Duration: 6:26
  • Updated: 20 Feb 2015
  • views: 121
videos
This video describes how to standardize variables (converting variables into z-scores based on a standard normal distribution) and how to create an index score from variables on different scales (3:27). This video includes a brief reminder of how to read the exponential notation sometimes used by R (at 4:30).
https://wn.com/Mpa_Stats_Plugin_4_Standardizing_Variables_And_Creating_An_Index
How to Use SPSS: Factor Analysis (Principal Component Analysis)

How to Use SPSS: Factor Analysis (Principal Component Analysis)

  • Order:
  • Duration: 50:16
  • Updated: 28 May 2013
  • views: 233635
videos
Determining the efficiency of a number of variables in their ability to measure a single construct. Link to Monte Carlo calculator: http://www.allenandunwin.com/spss4/further_resources.html Download the file titled MonteCarloPA.zip.
https://wn.com/How_To_Use_Spss_Factor_Analysis_(Principal_Component_Analysis)
PHP Tutorial for Beginners 17 # Using $_GET Variables in PHP

PHP Tutorial for Beginners 17 # Using $_GET Variables in PHP

  • Order:
  • Duration: 19:45
  • Updated: 06 Aug 2014
  • views: 34736
videos
get - PHP $_GET Variable php - How to set $_GET variable PHP - easiest way to get $_GET parameters string as written PHP: $_GET php $_request php $_get array php $_get example php isset php $_get undefined index php $_get not working php $_get multiple values php $_get empty Verwandte Suchanfragen zu php $_GET php $_get auslesen php get url php $_get array php $_get undefined index php $_get empty php $_get page php $_get leer php $_get absichern
https://wn.com/Php_Tutorial_For_Beginners_17_Using_Get_Variables_In_Php
Simplifying Radicals any index and variables

Simplifying Radicals any index and variables

  • Order:
  • Duration: 17:37
  • Updated: 27 Oct 2017
  • views: 2
videos
https://wn.com/Simplifying_Radicals_Any_Index_And_Variables
Differential Equations (3) - Variables Separable : ExamSolutions

Differential Equations (3) - Variables Separable : ExamSolutions

  • Order:
  • Duration: 9:28
  • Updated: 26 Sep 2012
  • views: 61334
videos
Go to http://www.examsolutions.co.uk to see the full index, playlists and more maths videos on differential equations and other maths topics
https://wn.com/Differential_Equations_(3)_Variables_Separable_Examsolutions
Simplifying Radicals of Index 2: Radicand Contains Variables

Simplifying Radicals of Index 2: Radicand Contains Variables

  • Order:
  • Duration: 19:11
  • Updated: 10 Sep 2011
  • views: 1528
videos
https://wn.com/Simplifying_Radicals_Of_Index_2_Radicand_Contains_Variables
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