Subscripted assignment between dissimilar structures?

I am using two file as

i=[0:.01:1]
for j=1:length(i)
   A=sin(i) 
  save('test.mat','A','i');
    
end
%%%%and this
i=[0:.01:1]
for j=1:length(i)
   A=cos(i) 
  save('test1.mat','A','i');
    
end

I wants to plot these two data in one plot and using

data(1)=load('D:/Seminars_and_conference/DAE_SSPE_2019/New_folder_CD/DAE_SSPE_2019/concentration_test/test1/mixing/test.mat')
data(2)=load('D:/Seminars_and_conference/DAE_SSPE_2019/New_folder_CD/DAE_SSPE_2019/concentration_test/test1/mixing/test1.mat')

for i=1:numel(data)
datastruct=data(i)
plot(datastruct.i,datastruct.A)
hold on
end

but i found error as Subscripted assignment between dissimilar structures.

Error in dragrate_SiO2 (line 1)

data(1)=load('D:/Seminars_and_conference/DAE_SSPE_2019/New_folder_CD/DAE_SSPE_2019/concentration_test/test1/mixing/test.mat')

[Jan]

I used the buttons on top of the field for editing the message to format it. You can do this by your own also to improve the readability of the code.