how to store a changing variable matrix with the same name

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Bou
Bou 2014-2-19
评论： Jos (10584) 2014-2-19
Hello,
I have a row (1x8) of variables named Pars. The variables of Pars are changed by a function (fminsearch). I want to save Pars into another matrix each time one of the variables is changed. I've tried to use an output-function within fminsearch but this doesnt work.
However, within my minimization function (the function that fminsearch tries to minimize) I can write display(Pars) and the variables of Pars are displayed each time one of them is changed. I want to store the displayed variables in a matrix so each time one of the variables is changed they are stored in a new row.
I've tried something like this (this was recommended by someone) but it doesnt work. I also want to save the data to the workspace.
data(1:length(Pars), and+1)=Pars
Can anyone help me? Thanks in advance!
greetings Boudewijn

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回答（1 个）

Jos (10584)
Jos (10584) 2014-2-19
Something like this?
data = nan(0,8)
pars = fminsearch(...)
if IsChanged(pars),
data(end+1,:) = pars ;
end
IsChanged is a function (or expression) that you have to define yourself.
  1 个评论
Jos (10584)
Jos (10584) 2014-2-19
btw your pars is a row vector with 8 columns, but your expression " data(1:length(Pars), end+1)=Pars " suggests that you want to store it as the last column. This does not add up ...

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