writing a cat file

i have a values

A=[m V SD],where m is mean, v is variance ,sd is standard dev of an image

now i want to write A into folder ,my folder name is new1

i have 100 images ,and have found m,v,sd for all images

so in that folder i need to store all values i.e(A1 to A100) please help

[Jan]

Do you want to write the values to one file or to 100 files? What have you tried so far and which problems occurred? I suggest reading the documentation. Writing numerical vectors to files is explained there repeatedly and exhaustively.

[Chandra Kurniawan]

Hello, Pat

Writing into MAT files or Text files??

[Pat]

text file

[Jan]

This is your 107th question in this forum. It is time to learn how to include all necessary details to a question. Currently you could get an acceptence rate of only 19%. Improving the quality of your questions would be a very good idea.

E.g. at first you are talking of the vector A and explain, what the values mean. But for the actual problem rand(1,4) would be equivalent also. In opposite to such unnecessary information, it is not explained anywhere whar "A1" and "A100" is. Later on in this thread it comes out, that you can to save a struct instead.

Finally, when I see the bunch of problems you have posted here, it is very hard for me to imagine, that you cannot find out, how to write some numbers to a file. Pat, this is extremly basic.

Answer 1

[Chandra Kurniawan]

Hello, Pat

I just give you small example.

Then, I hope you can use it or do modification on it for your purpose.

clear; clc;

for cnt = 1 : 10
    m = 255*rand;
    V = 255*rand;
    SD = 255*rand;

      filename = strcat(pwd,'\New1\A',num2str(cnt),'.txt');
      fid = fopen(filename, 'w');
      fprintf(fid,'mean : %.2f\n variance : %.2f\n standard dev : %.2f\n',m,V,SD);
      fclose(fid);
  end

[Pat]

F =

Contrast: 0.2963

Correlation: 0.9414

Energy: 0.1124

Homogeneity: 0.8891

for these i do as per ur code i get error ,please help

Error using ==> fprintf

Function is not defined for 'struct' inputs.

Error in ==> Untitled at 27

fprintf(fid,'values : %.2f\n ',F);

[Pat]

I want to write F

[Chandra Kurniawan]

Of course you cannot write a struct with command fprintf with format %.2f

[Chandra Kurniawan]

It might be :

for cnt = 1 : 3

F = struct;

F.Contrast = 0.2963;

F.Correlation = 0.9414;

F.Energy = 0.1124;

F.Homogeneity = 0.8891;

filename = strcat(pwd,'\New1\AA',num2str(cnt),'.txt');

fid = fopen(filename, 'w');

fprintf(fid,'Contrast : %.2f\n Correlation : %.2f\n Energy : %.2f\n Homogeneity : %.2f\n',F.Contrast,F.Correlation,F.Energy,F.Homogeneity);

fclose(fid);

end

[Jan]

@Chandra: FULLFILE is more secure than "strcat(pwd,'\New1\A',num2str(cnt),'.txt')". e.g. if the current folder is "C:\" the trailing file separator is considered.

@Pat: You've asked a question and Chandra gave a working asnwer. Afterwards you modify the conditions. It is obvious that this wastes the time of Chandra and all others who want to assist here.

[Pat]

no jan,i had two different questions,i got the answers,thank u chandra