How to import coordinates from a txt/csv file

Hi everyone,

I am very new to MATLAb so this is probably a very basic question. I am trying to write a script to analyse some results I have, I can output my results as either txt or csv files whichever works best. My issue is the file outputs the coordinates in the form (0,0,0) so I am not sure what the best way to import this would be if I wanted to create a 3D scatter plot, as the brackets seem to be causing problems.

Thanks for any help you can offer!

Answer 1

[per isakson]

Something like this should read your data. Try

    >> cac  = cssm( )
    cac = 
        [3x3 double]
    >> cac{:}
    ans =
         1     2     3
         4     5     6
         7     8     9

where

    function    cac  = cssm( )
        fid = fopen( 'cssm.txt' );
        cac = textscan(fid, '(%f%f%f)', 'CollectOutput', true ...
                                      , 'Delimiter'    , ','  ); 
        fclose( fid );
    end

and where cssm.txt contains (I'm guessing)

    (1,2,3) 
    (4,5,6) 
    (7,8,9)

[R2]

I tried to replicate your suggestion by firstly create the function and then using cad = cssm( ) however this did not work I got an error of an Undefined function or variable 'cssm'

[per isakson]

"create the function" . What function, obviously not cssm

You have to

• read and understand the whole answer and
• copy cssm.m of the answer to a folder in your Matlab path.

[Image Analyst]

R2, where did you attach your data file? It's not really fair or helpful to make people who are trying to help you work "blind" by not providing them with your data file. http://www.mathworks.com/matlabcentral/answers/728-how-do-i-write-a-good-question-for-matlab-answers

[R2]

Sorry about that I made a silly mistake the answer works perfectly, thank you!

Answer 2

[Azzi Abdelmalek]

A=dlmread('Yourfile.txt')

Or

A=xlsread('Yourfile.csv')

[R2]

I've tried both dlmread and csvread and they both don't work I'm guessing because of the format of the output being (0,0,0)