Develop a r program to calculate and visualize a correlation matrix for a given data set, with color coded cells indicating the strength and direction of correlations, using ggplot2 geom_tile function.

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All programs from 9-14

Develop a R program to calculate and visualize a correlation matrix for a given dataset, with color coded cells indicating the strength and direction of correlation , using ggplot2 geom_time function .

Write an R program to create multiple dot plots for grouped data , comparing the distribution of variable across different using ggplot2's position dodge function .