horzcat error Conversion to struct from double is not possible.

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rachna malik
rachna malik 2017-7-15
回答： Walter Roberson 2017-7-16
??? Error using ==> horzcat
The following error occurred converting from double to struct:
Error using ==> struct
Conversion to struct from double is not possible. Error in ==> svds at 65 B = [sparse(m,m) A; A' sparse(n,n)];
Error in ==> srmsvd at 9 [u,s,v,flag] = svds(A,neigs,'L',opts);
Error in ==> run_srm at 4 srmsvd(datapath,neigs);
code where error is occuring
:
function [U,S,V,flag] = svds(varargin)
A = varargin{1};
[m,n] = size(A);
p = min(m,n);
q = max(m,n);
B = [sparse(m,m) A; A' sparse(n,n)];
srmsvd:
function [] = srmsvd(datapath,neigs)
A = load(datapath)
disp 'data loaded'
disp(['neigs set to ' num2str(neigs)])
opts.issym = 0;
opts.isreal = 1;
opts.disp = 0;
[u,s,v,flag] = svds(A,neigs,'L',opts);
run_srm:
datapath = 'twitter_data.mat'; %path to matlab file with sparse data matrix
neigs = 50; %number of eigenvectors
srmsvd(datapath,neigs);

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回答（1 个）

Walter Roberson
Walter Roberson 2017-7-16
The result of
A = load(datapath)
is going to be a struct in which there is one field for every variable loaded from the .mat file. You need to extract the appropriate variable.

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