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| | == 3 Clicks and a Graph!== | | == 3 Clicks and a Graph!== |
| − | | + | Aster commands for using XMGrace [[Contrib:JMB/XMGrace]] |
| − | ===Aster commands for using XMGrace===
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| − | The standard CodeAster package comes with its own built in plotting ability. The commands for creating the output when embedded into the *.comm file, will create the output. We just need to tell ASTK to assign the results to a logical unit (LU=29) and a suitable output file name assigned with 'R' (i.e. Result). I normally use the extension <*.agr> for this output file. Any name and extension should work, I think.
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| − | This tutorial shows how to set up the comm file. Let us use the very nicely written tutorial by Kees Wouters as a base [http://www.caelinux.org/wiki/index.php/Contrib:KeesWouters/dynamicload]. That tutorial shows you how to conduct a modal and a forced dynamic response of a simple cylinder. The resulting plots of that tutorial were perhaps created using a spreadsheet or another such plotting tool.
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| − | ===Why XMGrace ?===
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| − | Why do I recommend XMGrace? Because it is easy to get plots once the command file has been set up. Thereafter it requires just 3 clicks in the ASTK window. One on the file name '*.agr', the second on 'Tools' and the third on 'Grace'. The immense benefit is, one can see very quickly graphically, if the results are what you expected.
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| − | Of course a speadsheet, octave, gnuplot, etc. has features that far exceed the plotting capabilities of XMGrace, I believe. But there's nothing to beat the handiness of plotting with 3 clicks! Especially when one is making several runs or a parametric study.
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| − | ===The commands===
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| − | All we need to add to the comm file just before the "FIN();" command is:
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| − | Dz=RECU_FONCTION(TABLE=TB_nodf,
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| − | PARA_X='INST',
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| − | PARA_Y='DZ',);
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| − | The explanation of this command is:
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| − | # Load into function Dz the nodal displacement values from table TB_nodf, values from column: DZ (Displacement Z) for each INST (Time step). Resulting in tuples where
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| − | # X values = Time Step instant
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| − | # Z values = the corresponding displacement in Z direction
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| − | T=RECU_FONCTION(TABLE=TB_nodf,
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| − | PARA_X='INST',
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| − | PARA_Y='INST',);
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| − | # Load into function T the time step values from table TB_nodf, values from column: INST. Resulting in tuples where
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| − | # X values = Time step instant
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| − | # T values = Time step Instant
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| − | (This second step may seem redundant, and if somebody has a more elegant way please let us know here. Essentially we are creating two arrays T & Dz which contain the time instants and corresponding displacements of the top node in the Z direction.)
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| − | Then output T versus Dz for plotting with XMGrace
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| − | IMPR_FONCTION(FORMAT='XMGRACE',
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| − | UNITE=29,
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| − | COURBE=_F(FONC_X=T,
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| − | FONC_Y=Dz,),
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| − | TITRE='Displacement Dz of the top node',
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| − | LEGENDE_X='Time [s]',
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| − | LEGENDE_Y='Displacement [mm]',);
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| − | In ASTK define a 'dat' type output file named 'dynload.agr' with unit number 29 with (R)
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| − | ===The graph!===
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| − | Then 3 clicks later (as described earlier) you should see a graphical plot!
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| − | [[Image:XMGrace.png]]
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| − | ==Topic 2==
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| | ==Salome: Creating Groups using TUI== | | ==Salome: Creating Groups using TUI== |
Revision as of 04:18, 17 August 2010
Topics under construction
3 Clicks and a Graph!
Aster commands for using XMGrace Contrib:JMB/XMGrace
Salome: Creating Groups using TUI
Use a Python script to create an element group using multiple filter criteria Contrib:JMB/SalomeGroupsTUI
A new page
