# varianceDescaling: Variance/Standardization Revert Function In gradDescent: Gradient Descent for Regression Tasks

## Description

A function to revert the value that has been done by variance/ . standardization scaling method.

## Usage

 1 varianceDescaling(dataSet, varianceParameter) 

## Arguments

 dataSet a data.frame that representing dataset (m \times n), where m is the number of instances and n is the number of variables where the last column is the output variable. dataSet must have at leas two columns and ten rows of data that contain only numbers (integer or float). varianceParameter a matrix that has value of variance scaling parameter, such as mean value and standard deviation value of data that can be used to restore the original value of dataset. This parameter is exclusively produced by varianceScaling function.

## Details

This function changes the value of variance scaled dataset that produced by varianceScaling function and represented by data.frame object.

## Value

a data.frame representing reverted dataset value

varianceScaling
 1 2 3 4 5 6 7 8 ################################## ## Revert Variance Scaling ## load R Package data data(gradDescentRData) ## get z-factor Data dataSet <- gradDescentRData$CompressilbilityFactor fsr <- varianceScaling(dataSet) rfsr <- varianceDescaling(fsr$scaledDataSet, fsr\$scalingParameter)