Error using boxplot>straightenX

Hi guys and thanks in advance. I have been trying to create boxplot for a matrix that is created after the result of series of computation. However when I do the boxplot command:

boxplot (x)

%The following error come up

Error using boxplot>straightenX (line 893)

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

Error in boxplot (line 273)

[xDat,gDat,origRow,xlen,gexplicit,origInd,origNumXCols] = straightenX(x,g);

I thought maybe if I rounded the value within the matrix it will be solved but when I do:

round(x,2)

%The following error came up

Error using sym/round

Too many input arguments.

So what is a good solution for this error in odrer to be able to get the boxplot for my matrix?

Answer 1

[Riya]

Hi Abdullah,

I understand that you are encountering an error while trying to create a boxplot for a matrix. The main reason for this error is the use of symbolic variable “x” without proper conversion.

The “boxplot” function does not support symbolic variables and requires a numeric matrix as input. To solve the issue, you can convert the symbolic matrix “x” to a numeric matrix using the “double” function.

x_numeric = double(x); 
boxplot(x_numeric);  

This would fix the issue and the plot would be generated.

For more information about the “boxplot” function and its input arguments, please refer the following documentation:

https://www.mathworks.com/help/stats/boxplot.html#bu180jd-2

Thanks!