write formatted 2D data into a file

[Pavel_47]

Hello,

Here is emulation of an extract of my testbed (where data should be saved into a file for postprocessing).

Here are keypoints:

• while running, the data are accumulated in a 2D array, where column_0 - the iteration number (integer value), column_1 ... column_3 - measured data (float values)
• on button STOP click this array is saved into a file

The problem I've met in this example - the data in all columns are saved in floating point format (please, see the screenshot below)

How to save column_0 in integer format, other columns - in floating point ?

Thanks

[Artem.SPb]

You can't store in one array different data type (see red dot mean type cast). So you can form 2 arrays or before writing split array and convert dbl to int.

Also, why you use event-structure out of loop? Your code wil work without it.

[Pavel_47]

Thanks

Indeed event struct  it's useless.

Concerning split arrays I didn't properly understand what you mean.

If I split 2 arrays and convert column_0 to integer, then how to proceed further ?

In the example below I tried to format splitted arrays into strings, but unfortunately write block doesn't support strings

[altenbach]

Use "built array" instead of "concatenate string". This created a 2D array. transpose if desired. the file tool accepts 2D array of strings.

(A file is just a long 1D string, so to get better control, just format it all in memory, delimiters and all, and then write it to a plain text file.)

[Pavel_47]

Even more simple - without FOR loop ... but still 1st column is formatted as float.

[Artem.SPb · Accepted solution]

I think this way to form array and string better.

When you use "insert into array" each iteration you waste memory and time

[Pavel_47]

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altenbach a écrit :

Use "built array" instead of "concatenate string". This created a 2D array. transpose if desired. the file tool accepts 2D array of strings.

(A file is just a long 1D string, so to get better control, just format it all in memory, delimiters and all, and then write it to a plain text file.)

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Build doesn't work (if I correctly understood your suggestion)

[altenbach]

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@Pavel_47 wrote:
Build doesn't work (if I correctly understood your suggestion)

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 Well, yes, it gets rid of the broken wire. 😄 I haven't studied what you really want. As I said, do all the formatting in memory to have full control, then just write a single plain string to a file. No need for fancy highlevel IO.

[Pavel_47]

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Artem.SPb a écrit :

I think this way to form array and string better.

When you use "insert into array" each iteration you waste memory and time

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Ok, thanks.

[altenbach]

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@Artem.SPb wrote:

When you use "insert into array" each iteration you waste memory and time

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It's not with every iteration. Also "built array" does the same thing so there is no difference.