reading from a text file

hello everyone,

i am trying to read from a text file which has the following format

X: 549.123 Y: -100.235 Z: -230.89

X: 550.123 Y: -101.235 Z: -231.89

X: 551.123 Y: -102.235 Z: -232.89

X: 552.123 Y: -103.235 Z: -233.89

X: 553.123 Y: -104.235 Z: -234.89

the problem is when i read using textscan it stores the data in 3*10 cells where the first cell format is in the first column X: and in second column 549.123.

i want to store data in 3 matrices each of 1*5 ?

eagerly waiting for a reply.

Answer 1

[Thomas]

Consider you have your data in file doc.txt, your ouput matrices are x_val,y_val, and z_val

fileID = fopen('doc.txt');

C = textscan(fileID, '%s %f32 %s %f32 %s %f32');
fclose(fileID);

x_val=cell2mat(C(:,2))
y_val=cell2mat(C(:,4))
z_val=cell2mat(C(:,6))

Output is

x_val =
        549.12
        550.12
        551.12
        552.12
        553.12
y_val =
       -100.24
       -101.24
       -102.24
       -103.24
       -104.24
z_val =
       -230.89
       -231.89
       -232.89
       -233.89
       -234.89

doc.txt is as follows

 X: 549.123 Y: -100.235 Z: -230.89 
X: 550.123 Y: -101.235 Z: -231.89 
X: 551.123 Y: -102.235 Z: -232.89 
X: 552.123 Y: -103.235 Z: -233.89 
X: 553.123 Y: -104.235 Z: -234.89