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ben18785
ben18785
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I am trying to set part of a Doubly-indexed list aInitialPopulation to cNumHeg. Specifically I am trying to set the 3rd part of the list aInitialPopulatiom[[cNodeNumber]] to cNumHeg.

My (attempted) implementation is shown below, any help as to why it isn't working would be appreciated.

cNumNode = 10;
cNumHeg = 3;
aInitialPopulation = initialPopulation[20, 10];(*A user defined function which creates a 20 by 10 list/array*)
addHeg[aPopulation_, aNode_, aNumHeg_] := (aTemp = aPopulation[[aNode]]; aTemp[[3]] = aNumHeg; aPopulation[[aNode]] = aTemp);
addHeg[aInitialPopulation, cNumNode, cNumHeg]

When I do this I get an error of the form:

Set::setps: in the part assignment is not a symbol.

It seems to be that I am trying to access part of a symbol rather than an array. I am not sure why this is - the code to modify the array works when it is not contained within a function definition. Any help much appreciated. Many thanks in advance.

Best,

Ben

I am trying to set part of a Doubly-indexed list aInitialPopulation to cNumHeg. Specifically I am trying to set the 3rd part of the list aInitialPopulatiom[[cNodeNumber]] to cNumHeg.

My (attempted) implementation is shown below, any help as to why it isn't working would be appreciated.

cNumNode = 10;
cNumHeg = 3;
aInitialPopulation = initialPopulation[20, 10];(*A 20 by 10 list/array*)
addHeg[aPopulation_, aNode_, aNumHeg_] := (aTemp = aPopulation[[aNode]]; aTemp[[3]] = aNumHeg; aPopulation[[aNode]] = aTemp);
addHeg[aInitialPopulation, cNumNode, cNumHeg]

When I do this I get an error of the form:

Set::setps: in the part assignment is not a symbol.

It seems to be that I am trying to access part of a symbol rather than an array. I am not sure why this is - the code to modify the array works when it is not contained within a function definition. Any help much appreciated. Many thanks in advance.

Best,

Ben

I am trying to set part of a Doubly-indexed list aInitialPopulation to cNumHeg. Specifically I am trying to set the 3rd part of the list aInitialPopulatiom[[cNodeNumber]] to cNumHeg.

My (attempted) implementation is shown below, any help as to why it isn't working would be appreciated.

cNumNode = 10;
cNumHeg = 3;
aInitialPopulation = initialPopulation[20, 10];(*A user defined function which creates a 20 by 10 list/array*)
addHeg[aPopulation_, aNode_, aNumHeg_] := (aTemp = aPopulation[[aNode]]; aTemp[[3]] = aNumHeg; aPopulation[[aNode]] = aTemp);
addHeg[aInitialPopulation, cNumNode, cNumHeg]

When I do this I get an error of the form:

Set::setps: in the part assignment is not a symbol.

It seems to be that I am trying to access part of a symbol rather than an array. I am not sure why this is - the code to modify the array works when it is not contained within a function definition. Any help much appreciated. Many thanks in advance.

Best,

Ben

Source Link
ben18785
ben18785
  • 3.2k
  • 16
  • 29

Error: in the part assignment is not a symbol

I am trying to set part of a Doubly-indexed list aInitialPopulation to cNumHeg. Specifically I am trying to set the 3rd part of the list aInitialPopulatiom[[cNodeNumber]] to cNumHeg.

My (attempted) implementation is shown below, any help as to why it isn't working would be appreciated.

cNumNode = 10;
cNumHeg = 3;
aInitialPopulation = initialPopulation[20, 10];(*A 20 by 10 list/array*)
addHeg[aPopulation_, aNode_, aNumHeg_] := (aTemp = aPopulation[[aNode]]; aTemp[[3]] = aNumHeg; aPopulation[[aNode]] = aTemp);
addHeg[aInitialPopulation, cNumNode, cNumHeg]

When I do this I get an error of the form:

Set::setps: in the part assignment is not a symbol.

It seems to be that I am trying to access part of a symbol rather than an array. I am not sure why this is - the code to modify the array works when it is not contained within a function definition. Any help much appreciated. Many thanks in advance.

Best,

Ben