Category: Methods

Calculate Polychoric Correlation in R

Calculate Polychoric Correlation in R, The correlation between ordinal variables is calculated using polychoric correlation. Remember that ordinal variables are categorical possible values and natural order. Some of the common scales measured on an...

Calculate Confidence Intervals in R

Calculate Confidence Intervals in R, A confidence interval is a set of values that, with a high degree of certainty, are likely to include a population parameter. Confidence intervals can be found all over...

Homoscedasticity in Regression Analysis

Homoscedasticity in Regression Analysis, The Goldfeldâ€“Quandt test checks for homoscedasticity in regression studies in statistics. This is accomplished by separating a dataset into two portions or groups, which is why the test is also...

How to Calculate Jaccard Similarity in R

Jaccard Similarity in R, The Jaccard similarity index compares two sets of data to see how similar they are. It might be anywhere between 0 and 1. The greater the number, the closer the...

How to do Chow Test in R

The Chow test is used to compare the coefficients of two distinct regression models on two separate datasets. This test is commonly used in econometrics using time series data to evaluate if the data...

How to perform Rolling Correlation in R

Rolling Correlation in R, Correlations between two-time series on a rolling window are known as rolling correlations. Correlations in time series are extremely valuable since they may be used to model and forecast if...

Anderson-Darling Test in R (Quick Normality Check)

Anderson-Darling Test in R, The Anderson-Darling Test is a goodness-of-fit test that determines how well your data fits a given distribution. This test is most typically used to see if your data follow a...

Granger Causality Test in R (with Example)

Granger-Causality Test in R, The Granger Causality test is used to examine if one time series may be used to forecast another. Subscribe to the Channel for video tutorials Null Hypothesis (H0): Time series...

How to Plot Observed and Predicted values in R

Plot Observed and Predicted values in R, In order to visualize the discrepancies between the predicted and actual values, you may want to plot the predicted values of a regression model in R. This...

error: No CurrentVersion entry in Software/JavaSoft registry!

error: No CurrentVersion entry in Software/JavaSoft registry!. When receiving the following problem while trying to install package xlxs in R. Error: package or namespace load failed for â€˜xlsxâ€™: .onLoad failed in loadNamespace() for ‘rJava’,...