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read value from text-file into var-item

Question asked by STRASSEG on Oct 11, 2004
Latest reply on Jul 18, 2005 by STRASSEG

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hello *,

new problem -> new question:

i have a text-file with one numeric value inside
(without index; first line)

for my simulation i need this value for a variable (var-component) in a ptolemy-schematic.

I already try to use the dataaccess-component, as well as a small ael-function. sadly, i get no running solution.

does someone has an idea?

thx georg

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linbing Oct 11, 2004 10:23 AM
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DataAccessComponent can be used to read from file for a variable in VAR block. A text file is OK as long as it is appropriately formated, for instance, Discrete format. Here is a small example.

Test File:
BEGIN DSCRDATA
% INDEX Value1 Value2
1 11 21
2 12 22
3 13 23
END DSCRDATA

DataAccessComponent (DAC1) parameters:
Type=Discrete
InterpMode=Index Lookup
iVar1=1
iVal1=2

VAR block:
X=file(DAC1, "Value1")

X will be 13 in your simulation.
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STRASSEG Jul 18, 2005 5:10 AM
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hi all,

until now i found a workaround of the described problem for the last few month. but now I would need a solution for a similar problem:

I divided a huge simulation into parts of it, by the help of the sequencer (lets say first and second one). but i have to transfer a
single value (calculated in schematic and can be stored by the printer, or other sink, to a file) to the second simulation of the sequencer.
herein i need this value in a "var"-instance.

So the my question is:
Which sink (and file-format) in the first simulation and which formular in the VAR-instance of the second simulation i have to use?

thx georg
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read value from text-file into var-item

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