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"Error" in the text output from parametr sweeps
Posted Sep 9, 2009, 10:53 p.m. EDT 1 Reply
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Hello,
I am trying to use the solve>>"parameter sweep" function, and I believe there is an error in the output file. There are three variables I need to sweep. The model is highly nonlinear in two of them, so I have those (in my case, G & c0) setup in the parametric solver. The third variable (VA) I sweep using the parameter sweep function. Thus, for every value of VA, I sweep through the whole list of values for c0 & G.
When you solve a model using a parameter sweep, the results you specify and the parameter values are recorded in a text file. Each parameter and result variable is supposed to get it's own column. Instead, what I see is that the values for c0 & G end up in the same column, and alternate. An example of the output file is shown below:
# Parameter sweep performed by COMSOL 3.5.0.603.
# Sweep started on Sep 9 2009, 19:22.
#
# The columns contain the following data:
#
# VA
# c0
# G
# J_Tot
#
-2 1e-035 -2.97083e-017
-2 0.01 -2.97083e-017
-2 1e-030 -2.99117e-017
-2 0.01 -2.03664e-014
-2 1e-010 -1.68585e-009
-1.95 1e-035 -2.97006e-017
-1.95 0.01 -2.97006e-017
-1.95 1e-030 -2.98988e-017
-1.95 0.01 -1.98447e-014
-1.95 1e-010 -1.63529e-009
In this snippet, G is being held constant at G = 0.01 and c0 is varying. There should be 4 columns, but there are only 3. The total length of the output data for each value of VA is equivalent to the number of parameter pairs in my parametric solver. Thus, I don't think this impacts my results. However, it is quite annoying. Is this a glitch in the parameter sweep function, or am I doing something wrong?
Thanks,
-Obadiah
I am trying to use the solve>>"parameter sweep" function, and I believe there is an error in the output file. There are three variables I need to sweep. The model is highly nonlinear in two of them, so I have those (in my case, G & c0) setup in the parametric solver. The third variable (VA) I sweep using the parameter sweep function. Thus, for every value of VA, I sweep through the whole list of values for c0 & G.
When you solve a model using a parameter sweep, the results you specify and the parameter values are recorded in a text file. Each parameter and result variable is supposed to get it's own column. Instead, what I see is that the values for c0 & G end up in the same column, and alternate. An example of the output file is shown below:
# Parameter sweep performed by COMSOL 3.5.0.603.
# Sweep started on Sep 9 2009, 19:22.
#
# The columns contain the following data:
#
# VA
# c0
# G
# J_Tot
#
-2 1e-035 -2.97083e-017
-2 0.01 -2.97083e-017
-2 1e-030 -2.99117e-017
-2 0.01 -2.03664e-014
-2 1e-010 -1.68585e-009
-1.95 1e-035 -2.97006e-017
-1.95 0.01 -2.97006e-017
-1.95 1e-030 -2.98988e-017
-1.95 0.01 -1.98447e-014
-1.95 1e-010 -1.63529e-009
In this snippet, G is being held constant at G = 0.01 and c0 is varying. There should be 4 columns, but there are only 3. The total length of the output data for each value of VA is equivalent to the number of parameter pairs in my parametric solver. Thus, I don't think this impacts my results. However, it is quite annoying. Is this a glitch in the parameter sweep function, or am I doing something wrong?
Thanks,
-Obadiah
1 Reply Last Post Sep 19, 2009, 8:52 a.m. EDT
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Posted:
1 decade ago
Hi
I typically send such problems to comsol support, if I have done it wrong they tell me, when its a glip in the software, then all of us gai from it, when comsol corrects the code for next issue.
Ivar
I typically send such problems to comsol support, if I have done it wrong they tell me, when its a glip in the software, then all of us gai from it, when comsol corrects the code for next issue.
Ivar