Percentage change and plot

I ran my code multiple times, by assigning a different value to one of the variables (Pa) each time. The results are stored in a matrix of solutions (cbf) 285x7. The 1st column is the one with the baseline values.

I would now like to calculate the percentage change of each column with respect to the baseline column and plot it against Pa (%cfb change vs. Pa) Could you help me?

I presume I have to perform this calculation:

for n=1:7

percentage= ((cbf(:,n) - (cbf(:,1))) ./ cbf(:,1)).*100

end

But the plot of %change cbf against the Pa values that I manipulated appears only as a white canvas:

plot(percentage,Pa)

Answer 1

[KL]

You may want to store the output in a matrix though,

 for n=1:size(cbf,2)-1
   percentage(:,n)= ((cbf(:,n+1) - (cbf(:,1))) ./ cbf(:,1)).*100
 end

or, you could just write without a loop,

 percentage = ((cbf(:,2:end) - (cbf(:,1))) ./ cbf(:,1)).*100;

Answer 2

[MAHANTH CHOUTA]

use your graph to estimate the rate of change of profit of a company