Column names in data sheet
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Hi
I have created this data sheet I would like load into matlab. If I leave the data sheet as merely numbers it imports fine using the "load" command. But what if I want to organize the data sheet a bit, and insert column names? I have tried enclosing the column headers/names in quotes, but "load" just complains about unrecognized text. The command "importdata" however terminates without complaint but produces the following output
>> test=importdata('data.txt')
test =
data: [25x4 double]
textdata: {'a ' 'b ' 'c' 'd'}
colheaders: {'a ' 'b ' 'c' 'd'}if true
Here my data set contains 25 x 4 numeric values, and at the top I have written the column names: a b c d. But how do I then get to the data? I have tried
test(a) 'complains that it does not recognize a
test('a') 'complains that the Index exceeds matrix dimensions
test(:,'a') 'complains that the Index exceeds matrix dimensions
test('a',:) 'complains that the Index exceeds matrix dimensions
All help is greatly appreciated, thanks :-)
have a good day
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Vishal Rane
il 13 Giu 2013
Modificato: Vishal Rane
il 13 Giu 2013
In your case test is a structure with three fields data, textdata and colheaders. Then again whether it is a matrix, struct or a cell array depends on the source of data.
To access data , use
test.data % all data
test.data(:,1) % first column
test.data(1,:) % first row
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