How to create pie chart using input from text file?

I want to create pie chart that represent colour and percentages. Right now, I already read text file using text scan which convert data into cell array. As from my understand to create pie chart, X should be in vector or matrix and I already convert from cell to matrix using cell2mat and it does not work. I am trying to use categorical array and as a result size of pie chart is equally divided. How to make size of each slices follow to percentages value? here is my code,

   load_data = fopen('out.txt');
   C = textscan(load_data, '%q %q %q %s %s %q');
   fclose(load_data);

   cellpercentage = C{1,6};
   matrix = reshape(cellpercentage,1,8);
   x = categorical (matrix)
   pie(x)

but if I manually write X = [10,45,15,30] size of slices in pie chart followed value X.