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Asked by Miguelcm90
on 8 Sep 2013

Dear friends, many thanks for helping me, it was succesfull.

I would like to help me in this task, having the next file as example, I will try to explain with only a reduced number of values of the file.

https://www.dropbox.com/s/y3ehqalm3cxmzuj/x.txt

Below is what I have to start, I would need something what is able to do what is shown in "desired output"

imput: 306,000 305,952 304,683 302,265 300,219 306,000 306,008 304,977 302,450 299,846 306,000 305,962 304,840 302,413 299,812 306,000 306,051 305,051 302,396 299,877 306,000 306,003 304,891 302,163 300,017 306,000 306,004 305,002 301,997 300,186 406,000 406,016 404,943 402,467 400,224 406,000 406,009 404,961 402,483 400,361 406,000 406,014 404,852 402,547 400,287 406,000 406,043 404,990 402,520 400,372 406,000 406,048 405,105 402,425 400,817 406,000 406,034 404,928 402,425 400,623 506,000 506,038 505,182 502,518 500,878 506,000 506,003 505,208 502,728 500,684 506,000 505,971 505,110 502,841 501,118 506,000 505,979 505,083 502,644 500,922 506,000 505,985 505,065 502,942 500,955 506,000 506,062 505,067 502,818 501,280

output:

(first 3 rows of all groups of same index) 306,000 305,952 304,683 302,265 300,219 406,000 406,016 404,943 402,467 400,224 506,000 506,003 505,208 502,728 500,684

(second 3 rows of all groups of same index)

306,000 306,008 304,977 302,450 299,846 406,000 406,009 404,961 402,483 400,361 506,000 506,003 505,208 502,728 500,684

(third 3 rows of all groups of same index

306,000 305,962 304,840 302,413 299,812 406,000 406,014 404,852 402,547 400,287 506,000 505,971 505,110 502,841 501,118

fourth 3 rows of all groups of same index

306,000 306,051 305,051 302,396 299,877 406,000 406,043 404,990 402,520 400,372 506,000 505,979 505,083 502,644 500,922

fifth...

306,000 306,003 304,891 302,163 300,017 406,000 406,048 405,105 402,425 400,817 506,000 505,985 505,065 502,942 500,955

sitxh...

306,000 306,004 305,002 301,997 300,186 406,000 406,034 404,928 402,425 400,623 506,000 506,062 505,067 502,818 501,280

The desired output would be if, for instance, in the original file I have 234 indexed in groups of 6 rows, I would like to obtain at the end matrix of 39x5 , and the number of matrix is the length, or the amount of rows that I have per group.

So, how could I do it?, save these results also would be needed.

I hope to have been clear. And, anyway, many thanks for your help. It was very useful for me, and I am doing little steps to learn how to program.

Best Regards,

Miguel

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Answer by Andrei Bobrov
on 8 Sep 2013

Edited by Andrei Bobrov
on 8 Sep 2013

x = dlmread('x.txt'); out = permute(reshape(x,[],numel(unique(x(:,1))),size(x,2)),[2 3 1]);

ADD

s = size(x); n = s(1)/numel(unique(x(:,1))); out = reshape(permute(reshape(x,n,[],s(2)),[2 1 3]),s);

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