how to save 3 files in one script?

I want to derive 3 subsets of data using one input data, but I am don't know how to save them to 3 files. There must be something wrong with the syntax? What is the correct syntax of saving files?

Thank you so much

function [data2,data3,data4]=clean_data(file)
load(file);
jj=1;
for ii=1:length(data)
  if(~isnan(data(ii,2)))
    data2(jj,:)=data(ii,:); 
    jj=jj+1;
  end  
end 
ll=1;

for kk=1:length(data2)
    if(data2(kk,2)==1)
        data3(ll,:)=data2(kk,:)
        ll=ll+1;
    end
end

   mm=1;
  for kk=1:length(data2)
      if(data2(kk,2)==0)
          data4(mm,:)=data2(kk,:)
          mm=mm+1;
      end
  end
     save('clean_data','newdataC','newdataE')
  end

Answer 1

[the cyclist]

It is not clear to me what you want to do. I am guessing that you want to

• Save data2 to the file 'clean_data.mat'
• Save data3 to the file 'newdataC.mat'
• Save data4 to the file 'newdataE.mat'

If that is correct, here is how to do that:

save('clean_data','data2')
save('newdataC','data3')
save('newdataE','data4')

[Liyun]

That is exactly what I meant. I tried save(), but Matlab keeps telling me that 'Variable newdataC is not found'. Do I need to declare newdataC somewhere earlier? THANK YOU

[the cyclist]

In the save() command, the first input is the filename, and the rest are the variables that will be saved to that file. You can only save to one file at a time.

In my syntax, I save the variable data2 to the file clean_data, then data3 to file newdataC, etc.

In your syntax, you are telling MATLAB to save the variables named newdataC and newdataE to the file named clean_data.

You get an error with your syntax because there is no variable named newdataC.

[Image Analyst]

I think it would be more explicit to say

save('clean_data.mat','data2')
save('newdataC.mat','data3')
save('newdataE.mat','data4')

which would make it clear that the first arg is a filename, not just some variable.