Struct contents reference from a non-struct array object
显示 更早的评论
hello
I am new to Matlab and I am trying to minimize the following function with fmincon:
function [ CRRA ] = CRRA(x)
tur = load('tur.mat');
wei = load('wei.mat');
ret = tur.tur *x';
first = 1 + ret;
util = ((first.^(-85))/(-85));
wut = wei. * util;
CRRA = -mean(wut);
end
tur is a 140x500 matrix, x is what I am looking for, i.e. a 1x500 matrix, and wei is a 140x1 matrix. The problem is the line
wut = wei. * util
where I want to multiply wei with util element by element. I get the message:
Struct contents reference from a non-struct array object
with reference to this line. I also tried wut = times (wei, util) but obviously didn't work.
When I copy wut = wei. * util; and paste it in the command editor it calculates wut correctly. I would really appreciate any help.
Thank you
采纳的回答
Steven Lord
2020-10-12
编辑：Steven Lord
2020-10-12
function [ CRRA ] = CRRA(x)
tur = load('tur.mat');
wei = load('wei.mat');
The preceding two lines load the MAT-file each and every time this function is called. Instead load the data once before calling fmincon and pass them into your objective function as additional parameters.
When you do this you can pass in tur.tur and wei.wei as the parameters, eliminating the need to extract those fields from each struct array each time the function is executed. You successfully extracted the field from tur on this line:
ret = tur.tur *x';
first = 1 + ret;
util = ((first.^(-85))/(-85));
but you forgot to extract the field on this line (in which I've replaced ". *" with ".*" to correct the original error) which led to the new error.
wut = wei.* util;
CRRA = -mean(wut);
end
更多回答（1 个）
Matt J
2020-10-12
0 个投票
I think you just have to get rid of the extra whitespace between . and *
3 个评论
K Kassimatis
2020-10-12
Use
>> dbstop if error
to pause execution where the error occurs and see what types of variables are being multiplied.
K Kassimatis
2020-10-12
类别
在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
