On Jun 5, 2012, at 11:50 AM, aledanda wrote:
Hi All,
Here is the problem: I'm trying to generate a number of Fourier
Descriptors
figures for an experiment.
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’
All I need is that they are created within a loop and saved with
sequential
names (e.g., s1_1.png, s1_2.png etc..) in my directory.
I created a nested loop with a counter for the different amplitudes
for the
actual shapes and a counter for the file names.
This script:
*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?
for (s in 1:length(count)){
png("~/Desktop/EMAS/FD_stimuli/s1_",s,".png")
plot(create.fourier.descriptor(amplitude = c(0, i, 0, 0)));
dev.off()
}
}*
.... gives me the following error:
/Error in switch(units, `in` = res, cm = res/2.54, mm = res/25.4, px
= 1) *
:
non-numeric argument to binary operator
Makes me wonder if this package's code has caused the interpreter to
attempt something illegal with the 'in' control construct.
> in<-5
Error: unexpected 'in' in "in"
> `in` <-5
> in
Error: unexpected 'in' in "in"
> rm(`in`)
In addition: Warning message:
In 1:count : numerical expression has 101 elements: only the first
used/
Oh... there it is.
it seems to be a problem with the resolution of each picture which is
different one form the other. In principle this shouldn't be a
problem if
every time a new png is created.
could you help me with this?
Thank you very much
Best,
Ale
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