Re: [R] Fourier descriptors created in a loop

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

Re: [R] Fourier descriptors created in a loop

Thanks for your email, in fact the problem was in the nested loop!! By removing it and adding at the end i = i + 1 I solved the problem, all the rest stays the same. Best -- View this message in context:

[R] Fourier descriptors created in a loop

Hi All, Here is the problem: I'm trying to generate a number of Fourier Descriptors figures for an experiment. 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

Re: [R] beginner's loop issue

Thank you all for your helpful comments! I solved my problem by creating an empty matrix before the loop and adjusting the loop itself, this is the code: size - dim(input) out - matrix('',nrow =size[1], ncol = 9) for (i in 1:nrow(input)) { out[i,1:3] -

[R] beginner's loop issue

Dear All, I hope you don't mind helping me with this small issue. I haven't been using R in years and I'm trying to fill in a matrix with the output of a function (I'm probably using the Matlab logic here and it's not working). Here is my code: for (i in 1:length(input)){ out[i,1:3] -

Re: [R] as.integer

probelm solved: data - read.table(pdvspt.txt, header = T, dec = ,) It was the coma, now I have everything in numeric. Thanks a lot for the support! Ale -- View this message in context: http://r.789695.n4.nabble.com/as-integer-tp2245987p2246989.html Sent from the R help mailing list archive

Re: [R] as.integer

Hi, thanks for your reply. I attached the example. I tried your suggestion: data[is.factor(data)] - lapply(data[is.factor(data)], function(x) as.numeric(as.character(x))) But I still have the var as factors. I'm thinking now, in the txt file the decimals numbers are separated with a coma.

[R] as.integer

Hi, Is there a way to recursively change the variables imported with read.table(..) - and then attached with attach(..) - from as.factor to as.integer? I have about 9 variables that are now recognized as factors but I need to do statistics on them so I need to change them in as.integer. It

[R] Plotting the PDF and the Cumulative Probability

Hallo, I have to fit my distribution with Beta-prime. I found the parameters now I need to plot the Cumulative probability and the Probability density of my fitted data. With gamma for exemple is easy: PDF: plot(x,dgamma(x, shape,rate)) Cumulative probability: plot(x,pgamma(x, shape,rate))

[R] Error in object$coefficients : $ operator not defined for this S4 class

Hallo, I received this error message while calculating the coefficents coef(fit, matrix=TRUE) Error in object$coefficients : $ operator not defined for this S4 class what is this? How can I solve it? Ale -- View this message in context:

[R] rle

Hallo, I have an other problem, I have this vector signData with an alternation of 1 and -1 that corrispond to the duration of two different percepts. I extracted the durations like this: signData- scan(dataTR10.txt) dur-rle(signData)$length Now I would like to extract only the positive

[R] Histogram

Hallo, How can I have the control of the width of each bin in the histogram? I would like to plot my data modifying the number and the width of the bins. Is there a good pdf or manual where i can learn to use the plot/hist in R very well? I find the help not always clear Thanks a lot Ale --

[R] Plot cumulative probability of beta-prime distribution

Hallo, I need your help. I fitted my distribution of data with beta-prime, I need now to plot the Cumulative distribution. For other distribution like Gamma is easy: x - seq (0, 100, 0.5) plot(x,pgamma(x, shape, scale), type= l, col=red) but what about beta-prime? In R it exists only pbeta

[R] re moving value from a vector

Hallo, I have a vector of several iterations and I have to remove /filter out all the values than 10, how can I do this? Thanks a lot Alessandra -- View this message in context: http://www.nabble.com/removing-value-from-a-vector-tp24250608p24250608.html Sent from the R help mailing list

[R] Fitting with Beta-prime

Hi, I need to fit my data with beta-prim distribution. I found the function in the package VGAM: betaprime and betaff. I don't know how can I make it work. I know that i need to calculate the parameters that describe this function on my distribution. But for exemple I don't understand the link

[R] Least Squares Method

Dear Helpers, I need to fit a gamma function on a distribution. I want to use the Method of the Least Squares for minimizing the sum of squared residuals (SSE). I don't know how to do this. I guess I need to calculate the best fit parameter values and then somehow comparing my empirical

[R] for loop

Hi, I need your help. I have a vector of numbers reflecting the switch in the perception of a figure. For a certain period I have positive numbers (which reflect the perception A) then the perception changes and I have negative numbers (perception B), and so on for 4 iterations. I need to

Re: [R] mode(x) - double

SOLVED: I imported again the data like this: data - scan (data.txt) Thanks Phil Spector! Alessandra aledanda wrote: Hi, I need your help!! I imported a big coloumn vector from a txt file but it results as mode :list I want to change it in numeric otherwise I can't do my analysis

[R] mode(x) - double

Hi, I need your help!! I imported a big coloumn vector from a txt file but it results as mode :list I want to change it in numeric otherwise I can't do my analysis. This is what i get: mode (data) - double Error in eval(expr, envir, enclos) : (list) object cannot be coerced to type 'double'