Issue plotting boxplot using data from data frame

Hello all,

I have a dataframe 'Newdata'.

I want to create a boxplot with 5 categories of the independent variable 'Religiosity' and the continous dependent variable 'Spatial Memory'. Thus, there should be five boxplots overall, one for each category of the independent variable 'religiosity'.

I have tried using the boxplot function - boxplot(Newdata, 'whisker',1.5) but this is giving me the error:

'X' parameter must be a numeric vector or matrix.

Would anyone be able to give me a helping hand as to how I can do this using the dataframe I have?

I have attached a screenshot below.

Thanks!

Answer 1

[Anmol Dhiman]

Hi Emre,

You are getting the error as NewData variable is a cell array whereas boxplot requires it to be a matrix.

To resolve the error you need to convert the cell array to matrix.

I would suggest you to first extract the indices of individual types using this answer.

After the extraction, get the respective values and store in a matrix.

Then you can call the boxplot.

Hope it helps