Get specific data from text file

I have a text file containing collected raw data. I am only interested in the three columns . How can I get only these three columns in a matrix. I tried

data= importdata('testfile.txt');

as a result I have the requested matrix data, textdata and colheaders. My question is how can I get only the data and omit the txtdata and colheaders.

There are five rows before starting collecting data.Like this, for example :

Interval=  0.001 s

ExcelDateTime=  4.1286505976192129e+004  2013-1-12 12:08:36.343

TimeFormat=  StartOfBlock

ChannelTitle=  XXXXX  XXXXX

Range=  5.000 mV  5.000 mV

after that there are there three columns(numbers) that I want to extract them. So I do not want the upper mentioned five lines to be included.

[per isakson]

see textscan, ... '%*f' skips a column

Answer 1

[Walter Roberson]

Use textscan() with HeaderLines set to 5 and format set to '%f%f%f'

[FeiMing]

fid= fopen('TestFile.txt');

C= textscan(fid,'%f%f%f', 'HeaderLines',5);

it gives C<1x3 cell> every element contains 40256x1 double

but no data/numbers, 40256 reflects the number of sampled data in every column.