Dot indexing is not supported for variables of this type

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Nassim CHERIF
Nassim CHERIF 2022-4-6
评论： Image Analyst 2022-4-7
hello, i have this feature Extraction algorithm but i have error : Dot indexing is not supported for variables of this type
xApp = av_train;
data=xApp (: , 1);
type = 1;
feature=featureExtraction(data,'mean',type);
there is my feature Extraction function, can anyone help me please
function feature=featureExtraction(data,param,type)
%
%Input:
% data:nxm, n:#of patterns, m: number of features
% method:'raw','mean','meanVar'
% window: window length
% type: 1 --- for movtimavg
% 2 --- for windowingLabels
switch param.method
case 'raw', feature = data;
case 'mean'
if (type==1)
feature = movtimavg(data,param.window,param.step);
end
if (type==2)
feature = windowingLabels(data,param.window,param.step);
end
case 'meanVar',feature = movtimavg(data,param.window,param.step,1);
if (type==1)
feature = movtimavg(data,param.window,param.step,1);
end
if (type==2)
feature = windowingLabels(data,param.window,param.step);
end
end

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采纳的回答

Scott MacKenzie
Scott MacKenzie 2022-4-6
编辑：Scott MacKenzie 2022-4-6
Change
xApp = av_train;
data=xApp (: , 1);
type = 1;
feature=featureExtraction(data,'mean',type);
to
xApp = av_train;
data=xApp (: , 1);
param.method = 'mean';
param.window = 3; % change window size, as needed
param.step = 2; % change step size, as needed
type = 1;
feature=featureExtraction(data,param,type);
  3 个评论
显示 1更早的评论
Scott MacKenzie
Scott MacKenzie 2022-4-6
OK, try the modified code in my answer. I'm not sure what window or step sizes might work for you, however.

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更多回答（1 个）

Image Analyst
Image Analyst 2022-4-6
编辑：Image Analyst 2022-4-6
Evidently param is not a structure like you thought.
Also
case 'meanVar',feature = movtimavg(data,param.window,param.step,1);
should be on two lines, not one.

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