Question

I have a text file containing thousands of attributes (each column indicates an attribute) and a column that shows the labels of each row.All data is numeric except the last column which is the labels. This column is string. I want to use matlab classification functions such as gscatter() to classify the data. The problem is that when I use load filename in matlab to load my data I get this error (in which “no” is one of the lables)

Unknown text on line number 1 of ASCII file C:\Program Files\MATLAB\R2011b\train\train.txt
“no”.

In fact I do not know how to load my data in matlab to be able to use matlab functions to classify the data.

Answer 1

Here is an example

train.txt

1,2,3,4,5,6,no
2,3,4,5,6,7,yes

myLoadScript.m

numAttribs = 6;        %# number of attributes (excluding the label)
frmt = [repmat('%f ',1,numAttribs) '%s'];
fid = fopen('train.txt', 'rt');
C = textscan(fid, frmt, 'Delimiter',',', 'CollectOutput',1);
fclose(fid);

The result:

>> C{1}
ans =
     1     2     3     4     5     6
     2     3     4     5     6     7

>> C{2}
ans = 
    'no'
    'yes'

Should be easy to adapt to work on your specific file format…