Error using 'graph' function in matlab R2019b

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Elie Matar
Elie Matar 2019-10-28
评论： Ofer Perl 2021-1-31
I have created a binarized symmetric matrix A (n x n) which represents the connectivity matrix with 1's and 0's - 1 representing the existence of an edge. This error though is general and works with any type of matrix. When using the command G=graph(A) I get the following error:
>> G=graph(A)
Error using graph.validateEdgeProperties (line 375)
Edge properties must be a table.
Error in graph/set.EdgeProperties (line 330)
G.EdgeProperties = graph.validateEdgeProperties(T);
Error in graph (line 278)
G.EdgeProperties = table(nonzeros(tril(A)), 'VariableNames', {'Weight'});
I am using R2019b. I have not used the graph function before on this version. What is the problem? It occurs irrespective of the matrix that I am using (it is a generic problem).
Thanks!
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Elie Matar
Elie Matar 2019-10-28
Hi Walter:
>> which -all table
C:\Program Files\MATLAB\R2019b\toolbox\matlab\datatypes\@table\table.m % table constructor
C:\Program Files\MATLAB\R2019b\toolbox\matlab\bigdata\@tall\table.m % tall method
Thanks!

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采纳的回答

Christine Tobler
Christine Tobler 2019-10-29
Could you try starting a new MATLAB and just enter the following code:
>> A = ones(3);
>> G = graph(A);
If this gives the error message you mentioned, could you again run the following lines on command line?
>> T = table(nonzeros(tril(A)), 'VariableNames', {'Weight'})
>> istable(T)
>> class(T)
If this returns true and 'table', we'll have a deeper mystery to solve. If not, please let us know what is being displayed for you.
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Elie Matar
Elie Matar 2019-10-29
That solves it! Thankyou very much for your help. Really appreciated.
Ofer Perl
Ofer Perl 2021-1-31
Christine's solution also worked for me, cheers!

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更多回答（1 个）

Steven Lord
Steven Lord 2019-10-28
Can you confirm that A is a matrix? What does this show when executed immediately before you try to construct the graph from A?
whos A
If that shows A is a matrix, thinking along the same lines as Walter's idea, do you have your own functions named nonzeros, tril, or istable? Do these commands show versions of these functions other than the ones provided by MATLAB?
which -all nonzeros
which -all tril
which -all istable
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Steven Lord
Steven Lord 2019-10-29
C:\Program Files\MATLAB\spm12\external\fieldtrip\compat\matlablt2013b\istable.m
This is taking precedence over istable function included in MATLAB. If possible rename it, remove it from the MATLAB path, or delete it altogether.

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