New tab Sheet using fprintf function

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Life is Wonderful
Life is Wonderful on 29 May 2023
Commented: Life is Wonderful on 1 Jun 2023
Ran in:
Here there,
I am trying to build code where I have a data and I want to enter the data in new/separate tab sheet for a single *.csv file where my data is filled like done in below piece of code
I would like to have new tab sheet with x data and another new tab sheet with y data.
Can some some help me
fid = fopen('data_tab_m.csv','w');
x = rand(1,3);
y = rand(3,1);
% first tab sheet
for i= 1:length(x)
fprintf('%f\n',x);
fprintf(fid,'%f\n',x);
end
0.119879 0.141342 0.281086 0.119879 0.141342 0.281086 0.119879 0.141342 0.281086
% second tab sheet
for i= 1:length(y)
fprintf('%f\n',y);
fprintf(fid,'%f\n',y);
end
0.523532 0.924488 0.376526 0.523532 0.924488 0.376526 0.523532 0.924488 0.376526
fclose(fid);

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Answers (1)

Walter Roberson
Walter Roberson on 29 May 2023
No, that is not possible. csv files are pure text files, and do not have tab sheets.
Putting data on other tabs is possible in .xls and .xlsx and .xlsm and .xlsb files, none of which store data in csv format.
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Walter Roberson
Walter Roberson on 31 May 2023
Ran in:
Suppose I gave you the assignment to write a Quicksort algorithm, but told you that you were not permitted to use any vowels in the code. That would be a "coding constraint".
iskeyword()
ans = 20×1 cell array
{'break' } {'case' } {'catch' } {'classdef' } {'continue' } {'else' } {'elseif' } {'end' } {'for' } {'function' } {'global' } {'if' } {'otherwise' } {'parfor' } {'persistent'} {'return' } {'spmd' } {'switch' } {'try' } {'while' }
You would not be permitted (in this thought experiment) to use any of the above except spmd and try (even though arguably the y in try is acting as a vowel.)
Your position implied from the above post is that because you have this coding constraint, that MATLAB must provide alternate keywords without vowels, just because doing so would make your coding easier.
Well, NO. Just because you want to do something does not mean that MATLAB must support doing it.
The technology used for csv files does not and cannot support "tabs" or "sheets" in the sense you want. And although the technology used for .xls, .xlsx, .xlsb, .xlsm files could permit convenience functions to write out multiple variables or multiple sheets in a single call, none of the interface functions for those kinds of files do permit doing that -- not even Microsoft's own interface to Excel.
Could the writetable() interface support a struct array into which you put data and information about the location (row, column, sheet name) that the data is to be written to, and then internally handle writing all of the information into the appropriate place? Yes, it could provide an interface like that. But it doesn't .
Life is Wonderful
Life is Wonderful on 1 Jun 2023
Ran in:
So, we both have great things to say, and the true use case is to provide a solution, and we both agree that one spreadsheet cannot support numerous tabs with multiple variables to write and read.
I will go another route and give data analysis where print includes multi-location variable print that collaborates data in the same area.
In the example code below, I organised all variables into a structure and can print all essential data in text, *.xls, *.xlsx, *.csv and so on.
In below example, say multi_data_analysis() does addition, multiplication, and data collection on a single sheet.
clc;clearvars;
fid = fopen('collect_data.csv','w');
T.a = 1:10;
T.b = 1:2:20;
T.c = 1:3:30;
T.d = 1:4:40;
clear T.x T.y;
fprintf('%10s|%10s|%10s|%10s|%10sd|\n----------+----------+----------+----------+----------+\n','i','j','a(i)','b(j)','x(i,J)');
i| j| a(i)| b(j)| x(i,J)d| ----------+----------+----------+----------+----------+
[T] = math_add(T);
1| 1| 1| 1| 2| 1| 2| 1| 3| 4| 1| 3| 1| 5| 6| 1| 4| 1| 7| 8| 1| 5| 1| 9| 10| 1| 6| 1| 11| 12| 1| 7| 1| 13| 14| 1| 8| 1| 15| 16| 1| 9| 1| 17| 18| 1| 10| 1| 19| 20| 2| 1| 2| 1| 3| 2| 2| 2| 3| 5| 2| 3| 2| 5| 7| 2| 4| 2| 7| 9| 2| 5| 2| 9| 11| 2| 6| 2| 11| 13| 2| 7| 2| 13| 15| 2| 8| 2| 15| 17| 2| 9| 2| 17| 19| 2| 10| 2| 19| 21| 3| 1| 3| 1| 4| 3| 2| 3| 3| 6| 3| 3| 3| 5| 8| 3| 4| 3| 7| 10| 3| 5| 3| 9| 12| 3| 6| 3| 11| 14| 3| 7| 3| 13| 16| 3| 8| 3| 15| 18| 3| 9| 3| 17| 20| 3| 10| 3| 19| 22| 4| 1| 4| 1| 5| 4| 2| 4| 3| 7| 4| 3| 4| 5| 9| 4| 4| 4| 7| 11| 4| 5| 4| 9| 13| 4| 6| 4| 11| 15| 4| 7| 4| 13| 17| 4| 8| 4| 15| 19| 4| 9| 4| 17| 21| 4| 10| 4| 19| 23| 5| 1| 5| 1| 6| 5| 2| 5| 3| 8| 5| 3| 5| 5| 10| 5| 4| 5| 7| 12| 5| 5| 5| 9| 14| 5| 6| 5| 11| 16| 5| 7| 5| 13| 18| 5| 8| 5| 15| 20| 5| 9| 5| 17| 22| 5| 10| 5| 19| 24| 6| 1| 6| 1| 7| 6| 2| 6| 3| 9| 6| 3| 6| 5| 11| 6| 4| 6| 7| 13| 6| 5| 6| 9| 15| 6| 6| 6| 11| 17| 6| 7| 6| 13| 19| 6| 8| 6| 15| 21| 6| 9| 6| 17| 23| 6| 10| 6| 19| 25| 7| 1| 7| 1| 8| 7| 2| 7| 3| 10| 7| 3| 7| 5| 12| 7| 4| 7| 7| 14| 7| 5| 7| 9| 16| 7| 6| 7| 11| 18| 7| 7| 7| 13| 20| 7| 8| 7| 15| 22| 7| 9| 7| 17| 24| 7| 10| 7| 19| 26| 8| 1| 8| 1| 9| 8| 2| 8| 3| 11| 8| 3| 8| 5| 13| 8| 4| 8| 7| 15| 8| 5| 8| 9| 17| 8| 6| 8| 11| 19| 8| 7| 8| 13| 21| 8| 8| 8| 15| 23| 8| 9| 8| 17| 25| 8| 10| 8| 19| 27| 9| 1| 9| 1| 10| 9| 2| 9| 3| 12| 9| 3| 9| 5| 14| 9| 4| 9| 7| 16| 9| 5| 9| 9| 18| 9| 6| 9| 11| 20| 9| 7| 9| 13| 22| 9| 8| 9| 15| 24| 9| 9| 9| 17| 26| 9| 10| 9| 19| 28| 10| 1| 10| 1| 11| 10| 2| 10| 3| 13| 10| 3| 10| 5| 15| 10| 4| 10| 7| 17| 10| 5| 10| 9| 19| 10| 6| 10| 11| 21| 10| 7| 10| 13| 23| 10| 8| 10| 15| 25| 10| 9| 10| 17| 27| 10| 10| 10| 19| 29|
fprintf('%10s|%10s|%10s|%10s|%10sd|\n----------+----------+----------+----------+----------+\n','i','j','c(i)','c(j)','y(i,J)');
i| j| c(i)| c(j)| y(i,J)d| ----------+----------+----------+----------+----------+
[T] = math_mul(T);
1| 1| 1| 1| 1| 1| 2| 1| 5| 5| 1| 3| 1| 9| 9| 1| 4| 1| 13| 13| 1| 5| 1| 17| 17| 1| 6| 1| 21| 21| 1| 7| 1| 25| 25| 1| 8| 1| 29| 29| 1| 9| 1| 33| 33| 1| 10| 1| 37| 37| 2| 1| 4| 1| 4| 2| 2| 4| 5| 20| 2| 3| 4| 9| 36| 2| 4| 4| 13| 52| 2| 5| 4| 17| 68| 2| 6| 4| 21| 84| 2| 7| 4| 25| 100| 2| 8| 4| 29| 116| 2| 9| 4| 33| 132| 2| 10| 4| 37| 148| 3| 1| 7| 1| 7| 3| 2| 7| 5| 35| 3| 3| 7| 9| 63| 3| 4| 7| 13| 91| 3| 5| 7| 17| 119| 3| 6| 7| 21| 147| 3| 7| 7| 25| 175| 3| 8| 7| 29| 203| 3| 9| 7| 33| 231| 3| 10| 7| 37| 259| 4| 1| 10| 1| 10| 4| 2| 10| 5| 50| 4| 3| 10| 9| 90| 4| 4| 10| 13| 130| 4| 5| 10| 17| 170| 4| 6| 10| 21| 210| 4| 7| 10| 25| 250| 4| 8| 10| 29| 290| 4| 9| 10| 33| 330| 4| 10| 10| 37| 370| 5| 1| 13| 1| 13| 5| 2| 13| 5| 65| 5| 3| 13| 9| 117| 5| 4| 13| 13| 169| 5| 5| 13| 17| 221| 5| 6| 13| 21| 273| 5| 7| 13| 25| 325| 5| 8| 13| 29| 377| 5| 9| 13| 33| 429| 5| 10| 13| 37| 481| 6| 1| 16| 1| 16| 6| 2| 16| 5| 80| 6| 3| 16| 9| 144| 6| 4| 16| 13| 208| 6| 5| 16| 17| 272| 6| 6| 16| 21| 336| 6| 7| 16| 25| 400| 6| 8| 16| 29| 464| 6| 9| 16| 33| 528| 6| 10| 16| 37| 592| 7| 1| 19| 1| 19| 7| 2| 19| 5| 95| 7| 3| 19| 9| 171| 7| 4| 19| 13| 247| 7| 5| 19| 17| 323| 7| 6| 19| 21| 399| 7| 7| 19| 25| 475| 7| 8| 19| 29| 551| 7| 9| 19| 33| 627| 7| 10| 19| 37| 703| 8| 1| 22| 1| 22| 8| 2| 22| 5| 110| 8| 3| 22| 9| 198| 8| 4| 22| 13| 286| 8| 5| 22| 17| 374| 8| 6| 22| 21| 462| 8| 7| 22| 25| 550| 8| 8| 22| 29| 638| 8| 9| 22| 33| 726| 8| 10| 22| 37| 814| 9| 1| 25| 1| 25| 9| 2| 25| 5| 125| 9| 3| 25| 9| 225| 9| 4| 25| 13| 325| 9| 5| 25| 17| 425| 9| 6| 25| 21| 525| 9| 7| 25| 25| 625| 9| 8| 25| 29| 725| 9| 9| 25| 33| 825| 9| 10| 25| 37| 925| 10| 1| 28| 1| 28| 10| 2| 28| 5| 140| 10| 3| 28| 9| 252| 10| 4| 28| 13| 364| 10| 5| 28| 17| 476| 10| 6| 28| 21| 588| 10| 7| 28| 25| 700| 10| 8| 28| 29| 812| 10| 9| 28| 33| 924| 10| 10| 28| 37| 1036|
fprintf(['%10s|%10s|%10s|%10s|%10s|%10s|%10s|%10sd|\n' ...
'----------+----------+----------+----------+----------+----------+----------+-----------+\n'], ...
'u','v','T.a(u)','T.b(u)','T.c(u)','T.d(u)','T.x(u,v)','T.y(u,v)');
u| v| T.a(u)| T.b(u)| T.c(u)| T.d(u)| T.x(u,v)| T.y(u,v)d| ----------+----------+----------+----------+----------+----------+----------+-----------+
fprintf(fid,['%10s, %10s, %10s, %10s, %10s, %10s, %10s, %10s\n'], ...
'u','v','T.a(u)','T.b(u)','T.c(u)','T.d(u)','T.x(u v)','T.y(u v)');
for u = 1:size(T.x,1)
for v = 1:size(T.x,1)
fprintf('%10d|%10d|%10d|%10d|%10d|%10d|%10d|%10d|\n',u,v,T.a(u),T.b(u),T.c(u),T.d(u),T.x(u,v),T.y(u,v));
fprintf(fid,'%10d, %10d, %10d, %10d, %10d, %10d, %10d, %10d, \n',u,v,T.a(u),T.b(u),T.c(u),T.d(u),T.x(u,v),T.y(u,v));
end
end
1| 1| 1| 1| 1| 1| 2| 1| 1| 2| 1| 1| 1| 1| 4| 5| 1| 3| 1| 1| 1| 1| 6| 9| 1| 4| 1| 1| 1| 1| 8| 13| 1| 5| 1| 1| 1| 1| 10| 17| 1| 6| 1| 1| 1| 1| 12| 21| 1| 7| 1| 1| 1| 1| 14| 25| 1| 8| 1| 1| 1| 1| 16| 29| 1| 9| 1| 1| 1| 1| 18| 33| 1| 10| 1| 1| 1| 1| 20| 37| 2| 1| 2| 3| 4| 5| 3| 4| 2| 2| 2| 3| 4| 5| 5| 20| 2| 3| 2| 3| 4| 5| 7| 36| 2| 4| 2| 3| 4| 5| 9| 52| 2| 5| 2| 3| 4| 5| 11| 68| 2| 6| 2| 3| 4| 5| 13| 84| 2| 7| 2| 3| 4| 5| 15| 100| 2| 8| 2| 3| 4| 5| 17| 116| 2| 9| 2| 3| 4| 5| 19| 132| 2| 10| 2| 3| 4| 5| 21| 148| 3| 1| 3| 5| 7| 9| 4| 7| 3| 2| 3| 5| 7| 9| 6| 35| 3| 3| 3| 5| 7| 9| 8| 63| 3| 4| 3| 5| 7| 9| 10| 91| 3| 5| 3| 5| 7| 9| 12| 119| 3| 6| 3| 5| 7| 9| 14| 147| 3| 7| 3| 5| 7| 9| 16| 175| 3| 8| 3| 5| 7| 9| 18| 203| 3| 9| 3| 5| 7| 9| 20| 231| 3| 10| 3| 5| 7| 9| 22| 259| 4| 1| 4| 7| 10| 13| 5| 10| 4| 2| 4| 7| 10| 13| 7| 50| 4| 3| 4| 7| 10| 13| 9| 90| 4| 4| 4| 7| 10| 13| 11| 130| 4| 5| 4| 7| 10| 13| 13| 170| 4| 6| 4| 7| 10| 13| 15| 210| 4| 7| 4| 7| 10| 13| 17| 250| 4| 8| 4| 7| 10| 13| 19| 290| 4| 9| 4| 7| 10| 13| 21| 330| 4| 10| 4| 7| 10| 13| 23| 370| 5| 1| 5| 9| 13| 17| 6| 13| 5| 2| 5| 9| 13| 17| 8| 65| 5| 3| 5| 9| 13| 17| 10| 117| 5| 4| 5| 9| 13| 17| 12| 169| 5| 5| 5| 9| 13| 17| 14| 221| 5| 6| 5| 9| 13| 17| 16| 273| 5| 7| 5| 9| 13| 17| 18| 325| 5| 8| 5| 9| 13| 17| 20| 377| 5| 9| 5| 9| 13| 17| 22| 429| 5| 10| 5| 9| 13| 17| 24| 481| 6| 1| 6| 11| 16| 21| 7| 16| 6| 2| 6| 11| 16| 21| 9| 80| 6| 3| 6| 11| 16| 21| 11| 144| 6| 4| 6| 11| 16| 21| 13| 208| 6| 5| 6| 11| 16| 21| 15| 272| 6| 6| 6| 11| 16| 21| 17| 336| 6| 7| 6| 11| 16| 21| 19| 400| 6| 8| 6| 11| 16| 21| 21| 464| 6| 9| 6| 11| 16| 21| 23| 528| 6| 10| 6| 11| 16| 21| 25| 592| 7| 1| 7| 13| 19| 25| 8| 19| 7| 2| 7| 13| 19| 25| 10| 95| 7| 3| 7| 13| 19| 25| 12| 171| 7| 4| 7| 13| 19| 25| 14| 247| 7| 5| 7| 13| 19| 25| 16| 323| 7| 6| 7| 13| 19| 25| 18| 399| 7| 7| 7| 13| 19| 25| 20| 475| 7| 8| 7| 13| 19| 25| 22| 551| 7| 9| 7| 13| 19| 25| 24| 627| 7| 10| 7| 13| 19| 25| 26| 703| 8| 1| 8| 15| 22| 29| 9| 22| 8| 2| 8| 15| 22| 29| 11| 110| 8| 3| 8| 15| 22| 29| 13| 198| 8| 4| 8| 15| 22| 29| 15| 286| 8| 5| 8| 15| 22| 29| 17| 374| 8| 6| 8| 15| 22| 29| 19| 462| 8| 7| 8| 15| 22| 29| 21| 550| 8| 8| 8| 15| 22| 29| 23| 638| 8| 9| 8| 15| 22| 29| 25| 726| 8| 10| 8| 15| 22| 29| 27| 814| 9| 1| 9| 17| 25| 33| 10| 25| 9| 2| 9| 17| 25| 33| 12| 125| 9| 3| 9| 17| 25| 33| 14| 225| 9| 4| 9| 17| 25| 33| 16| 325| 9| 5| 9| 17| 25| 33| 18| 425| 9| 6| 9| 17| 25| 33| 20| 525| 9| 7| 9| 17| 25| 33| 22| 625| 9| 8| 9| 17| 25| 33| 24| 725| 9| 9| 9| 17| 25| 33| 26| 825| 9| 10| 9| 17| 25| 33| 28| 925| 10| 1| 10| 19| 28| 37| 11| 28| 10| 2| 10| 19| 28| 37| 13| 140| 10| 3| 10| 19| 28| 37| 15| 252| 10| 4| 10| 19| 28| 37| 17| 364| 10| 5| 10| 19| 28| 37| 19| 476| 10| 6| 10| 19| 28| 37| 21| 588| 10| 7| 10| 19| 28| 37| 23| 700| 10| 8| 10| 19| 28| 37| 25| 812| 10| 9| 10| 19| 28| 37| 27| 924| 10| 10| 10| 19| 28| 37| 29| 1036|
function [T] = math_add(T)
fid = fopen('collect_add.csv','w');
fprintf(fid,'%10s, %10s, %10s, %10s, %10sd, \n','i','j','a(i)','b(j)','x(i J)');
for i = 1:size(T.a,2)
for j = 1:size(T.b,2)
T.x(i,j) = T.a(i) + T.b(j);
fprintf('%10d|%10d|%10d|%10d|%10d|\n',i,j,T.a(i),T.b(j),T.x(i,j));
fprintf(fid,'%10d, %10d, %10d, %10d, %10d, \n',i,j,T.a(i),T.b(j),T.x(i,j));
end
end
fclose(fid);
end
function [T] = math_mul(T)
fid = fopen('collect_mul.csv','w');
fprintf(fid,'%10s, %10s, %10s, %10s, %10sd \n','i','j','c(i)','d(j)','y(i J)');
for i = 1:size(T.c,2)
for j = 1:size(T.d,2)
T.y(i,j) = T.c(i) .* T.d(j);
fprintf('%10d|%10d|%10d|%10d|%10d|\n',i,j,T.c(i), T.d(j),T.y(i,j));
fprintf(fid,'%10d, %10d, %10d, %10d, %10d, \n',i,j,T.c(i), T.d(j),T.y(i,j));
end
end
fclose(fid);
end
Thank you

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