On Jun 6, 2012, at 5:13 AM, aledanda wrote:
Hi David,
Thank you for your reply.
/Somehow I'm guessing that this will involve load an unnamed package.
Yep:
?create.fourier.descriptor
No documentation for ‘create.fourier.descriptor’ in specified packages
and libraries:
you could try ‘??create.fourier.descriptor’/
So I indeed forgot to mention in my post that my script starts with
*library('FourierDescriptors')*
/> *count <- seq(1, 7, 0.06)
for (i in 1:count){
I was also wondering what would happen when you passed a vector to
the ":" operator. A warning at the very least. What was the point of
this outer loop?/
I need the outer loop for changing the amplitude of my shapes at every
iteration.
I specified the amplitudes I want in
count <- seq(1, 7, 0.06).
This outer loop actually works (when I correct the "for (i in
1:count){"
into "for (i in count){.")
It generates in fact all the shapes I want. The problem is with the
inner
loop, it doesn't seem to save any png picture in my directory. The
error is:
*Error in switch(units, `in` = res, cm = res/2.54, mm = res/25.4, px
= 1) *
:
non-numeric argument to binary operator*
I report my all script here again:
library('FourierDescriptors')
count <- seq(1, 7, 1)
# Controlled shapes
for (i in count){
for (s in 1:length(count)){
png("~/Desktop/EMAS/FD_stimuli/s1_",s,".png")
Have you considered how difficult it might be to extract any
information from a .png file that was constructed only one pixel wide?
plot(create.fourier.descriptor(amplitude = c(0, i)));
dev.off()
}
}
Thank you for your help
Best
Ale
--
David Winsemius, MD
West Hartford, CT
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