accessing a .csv file

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Bob Matthews
Bob Matthews 2013-3-20
  1. Opened a .csv file in Excel
  2. num = xlsread (filename.csv)
  3. The required data is listed in the command window (790 rows and 6 columns)
  4. When I try to use the array of data in the following function call I receive an error: Undefined function or variable 'num'.
  5. run dataSplitter(num, integer1, integer2, integer3)
what am I doing wrong?
  2 个评论
Wouter
Wouter 2013-3-20
编辑：Image Analyst 2013-3-20
the variable
num
does apparently not exist; what happens if you type:
whos num
after step 2?
Bob Matthews
Bob Matthews 2013-3-20
Name Size Bytes Class Attributes
num 790x6 37920 double

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回答（1 个）

Image Analyst
Image Analyst 2013-3-20
Even though num is not null after step 2, it apparently is not defined by the time you get to step 5. Is step 5 in the same function as step 2? If not, see the FAQ for info on how to make the function that calls step 5 see the num from step 2.
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Image Analyst
Image Analyst 2013-3-20
Please watch this: debugging tutorial so you know how to check the values of variables. You will see that the variables you are trying to pass do not exist yet, at least not in that function. Each function has its own private workspace. Variables are not global by default. Set a breakpoint there and examine fullMATdiffSet when it stops at the breakpoint.

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