Import data from .csv files and use them as the input matrixes

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Vasek
Vasek 2012-3-23
Hello everybody,
I have several .csv files(always a file with just one worksheet) containing the input data. What I'd like to do is to take such a file and import certain number of rows (over the all columns, however the number of columns is fixed).
Let say I'd like to receive Matrix1 from "file.csv" with dimension (220 000:265 000, 2:400). Anybody experienced with that? Thank you. Best regards, Vasek

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回答（1 个）

William
William 2012-3-23
use the csvread() command
type
help csvread
  2 个评论
Vasek
Vasek 2012-3-23
Hey William, thanks for the answer.
I've tried already csvread before.
a=csvread('Velocity.csv',4,4);
But it returns the following error:
??? Error using ==> dlmread at 145
Number of HeaderColumns is greater than number of columns in file.
Error in ==> csvread at 52
m=dlmread(filename, ',', r, c);
Error in ==> Untitled at 1
a=csvread('Velocity.csv',4,4);
Eric
Eric 2012-3-23
In your question you state that you want to read all columns, yet you're telling the code to skip the first four. You should use
a = csvread('Velocity.csv', 4, 0);
to read in all columns but skip the first four rows.
-Eric

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