problems with eof

[poloni]

Hello,

i'am beginner in LabView.
I have one VI created. This reads the data-input-file only without errors when the last CR was NOT in file. My original data-file have the last CR, and then i have not the correct output. See attachment. WHYYY???

thank you

Sascha

[GerdW]

Hello Poloni,

your read routine expects the last line of data without a CR/LF. If you have a CR/LF, then it reads another line - but this line is empty. So your last data will be all zero. This leads to the wrong display: display data=0 at time=0 (=01.01.1904).

So you have to check, if the last line is empty. If so delete the last data set.

Best regards,
GerdW

[altenbach]

Poloni,

One way around it would be to check of the file ends in a ("), then add a newline. This way the rest of the code can be the same.

A few suggestions:

If you don't want the first row, skip it at the beginning instead of cutting it out later.

You must initialize the first shift register with zero, otherwise you won't read anything in the second run.

It is not efficient to read one line at a time from the file. Read the entire file, then use scan for tokens to get the lines, and again for each line to get the items. Since each line contains a known number of elements, you can use an inner FOR loop.

"Remove from array" is very inefficient and not needed at all here. Simply get the desired columns using index array for all values.

I made a few quick modifications (LabVIEW 7.0) to show some of the above points. See attached.

[poloni]

Hi,

THANK YOU. Your answer was very good. LabVIEW was so easy (when you know how it's works...)!

Bye,

Sascha