

hi,
"Bald Eagle" <cre### [at] netscapenet> wrote:
> "jr" <cre### [at] gmailcom> wrote:
>
> > the latter, I'm confident, although somewhat unsure of exact syntax.
>
> OK  I just usually searchengine my way to a solution :)
>
> > suggestion: attach your working version of svd.cpp, so we talk same code. I'll
> > play with it here to test; are the matrices filled just with floats?
>
> Right on.
> At the moment, my thoughts are:
>
> 1. the data must get read into a fauxmatrix std::vector container, which I
> suppose has to be created before assigning the data to it
>
> 2. it should have m rows  the number of vectors to process, and m columns  the
> first 3 are x, y, and z, and all the remaining columns are zeros
>
> Then hopefully I can use that lesson to apply the SVD output to the data in the
> SDL scene.
>
>
> There's hardly any data in the header file  I'm assuming that can just be added
> to the top of the .cpp file to keep it all selfcontained.
it's been .. quiet. in case you haven't addressed 1/2 yet, here's a quick,
though inefficient (and inelegant), hack. in the 'generate_matrix' function,
there's an assignment in the innermost 'for()'. if you change that line to
read:
std::cin >> matrix[row[col];
then you can pipe your data in. inefficient because you're reading one value at
a time. say you want a 2x2 matrix:
1.0 2.0
3.0 4.0
then your data file should read:
2
1.0
2.0
3.0
4.0
and you'd execute:
$ ./a.out < myfile
while I haven't actually tried it here, I'm quite confident it'll work. in the
long run you'd want to read and process a row of data at a time though. hth.
regards, jr.
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