# How to Visualise correlations among feature variables in R

Visualizing correlations among feature variables in R can help to easily identify patterns and relationships in the data. Here are a few ways to visualize correlations in R:

**Scatter Plots:** Scatter plots are a simple and effective way to visualize the relationship between two variables. In a scatter plot, each variable is plotted on the x-axis and y-axis. Points on the plot that form a linear pattern indicate a positive correlation, while points that form an inverted “V” shape indicate a negative correlation. Points that are randomly scattered indicate no correlation.

**Heatmaps:** Heatmaps are a way to represent data using a color-coded grid. In the context of correlation visualization, cells with darker colors indicate a stronger correlation and cells with lighter colors indicate a weaker correlation. Heatmaps are useful when you have more than two variables to visualize as it allows you to compare multiple variables at once.

**Correlation Matrix:** A correlation matrix is a table that shows the correlation coefficients between multiple variables. The coefficients are represented by a number between -1 and 1, where -1 indicates a strong negative correlation, 0 indicates no correlation and 1 indicates a strong positive correlation. Correlation matrix is a great way to summarize the correlation between all variables at once.

**Pair Plots:** Pair plots are a type of scatter plot that plots all possible combinations of variables against each other. It allows you to quickly identify patterns and correlations in your data, especially when you have more than two variables.

In summary, visualizing correlations among feature variables in R can be done by using scatter plots, heatmaps, correlation matrix and pair plots. Each method has its own advantages and can be used depending on the data and the purpose of the analysis.

In this Applied Machine Learning Recipe, you will learn: How to Visualise correlations among feature variables in R.

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