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questions about CSVREAD when import data into MATLAB

Asked by Xiaoran Song on 12 Jul 2014
Latest activity Commented on by Image Analyst on 12 Jul 2014

I am now using CSVREAD to import csv datas ,some of the datas are as follows The first line of CSV is head line and my matlab scrip is

m11=csvread('SPC.csv',2,0);
However sometimes, MATLAB terminate with errors saying "
Error using dlmread (line 139)
Empty format string is not supported at the end of a
file.

Error in csvread (line 48) m=dlmread(filename, ',', r, c);

Error in MAIN_WB_DYNA_ANASIS (line 68) af=csvread('DISNODE.csv',2,0);

time,114059,
0,0,
0.00096509,-6.4337e-011,
0.00193018,-8.5843e-010,
0.0029757,-4.1747e-009,
0.00394079,-1.1399e-008,
0.0049863,-2.5976e-008,
0.00595139,-4.7814e-008,
0.0069969,-8.3311e-008,
0.00796199,-1.2971e-007,
0.00892709,-1.9175e-007,
0.0099726,-2.7931e-007,
0.0109377,-3.8154e-007,
0.0119832,-5.1866e-007,
0.0129483,-6.7264e-007,

1 Comment

Image Analyst on 12 Jul 2014

You forgot to attach the csv file.

Xiaoran Song

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1 Answer

Answer by dpb on 12 Jul 2014
Edited by dpb on 12 Jul 2014

... The first line of CSV is head line ...

Per the help file for csvread,

M = csvread('FILENAME') reads a comma separated value formatted file
  FILENAME.  The result is returned in M.  The file can only contain
  numeric values.

Note the last sentence above--if there's a header line, you can't use csvread (or dlmread, either, as you can observe from the error message that the former is just a wrapper around the latter.

Use importdata or textscan or even textread instead...

importdata will automagically try to determine the number of header line(s); use the 'headerline' named argument in the textXXX routines.

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dpb

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