Matlab

Extracting data from tab separated data files
Hi everyone, I have a bunch of tab-separated data files produced by a script that acquires data in a Psychology experiment. I would like to be able to access the numerical data in each file easily, and the first step is probably to extract a big matrix from each file. Unfortunately, the script created rather slop... 8 Apr 2010 18:33

piecelin function (Interpolation)
Hi there, please can you delight us about "k(x(j) <= u) =j" what does it do in the following the file.m ? I can not see how it works. thank you Regards, Abdullah function v = piecelin(x,y,u) %PIECELIN Piecewise linear interpolation. % v = piecelin(x,y,u) finds the piecewise linear L(x) % with L(x(j)) ... 8 Apr 2010 05:03

problem with fmincon
I used 'fmincon' for optimization with more than one non linear constraints.. It s working but I am getting a e+034 factor extra for my value which i should not get . All other values are correct whatever I have given..I have given the lower bound as 1 and upper bound as 2..But there is always this factor coming in my ... 11 Apr 2010 12:20

Grayscale Image
I am trying to convert the color image into black and white without using the rgb2gray function. i understand the grayscale image M pixels tall and N pixels wide is represented as a matrix of double datatype of size M×N and denote the pixel grayscale intensities in [0,1] with 0=black and 1=white but not sure how... 8 Apr 2010 06:08

xpc target for pc104: specific setup?
Hi. I'm trying to use xpc target 3.4 for a PC104 board. The board has a R6040 ethernet chip. By trial and errors, I found out that selecting the SMC91C9X driver (ISA-bus, TC/IP connection), the boot floppy is correctly installed on the PC104 (no error message displayed on the target). However, when I try to connect ... 8 Apr 2010 09:28

Repeating Sequence Interpolating Breakdown
This is a minor problem, but I am curious if I am causing it because I would like to fix it so I do not need to explain the glitch to each person I send my model to. When the model is closed, the next time that it is reopened, the Repeating Sequence Interpolating block no longer functions. Instead, it reads out th... 8 Apr 2010 03:58

wind turbine demo
Hi, I am learning wind turbine system using the Wind Farm (DFIG detailed model) I found that when I remove the blocks inside the wind turbine block and try to connect directly to the grid, the simulation results are different. Can anyone help in explaining why is this happened please? Thank you ... 8 Apr 2010 03:58

Importing all files from a folder
Hello, I am trying to automate the importing of data files for analysis. Essentially, I want to allow the user to choose a directory, and then have all of the data files from that directory be imported. For example: /dir1 file1 file2 file3 (choose 'dir1' and have Matlab begin importing 'file1') I'm jus... 8 Apr 2010 02:53

pvvar results do not match Excel's NPV
I am working on Financial calculation to get Net Present Value In Matlab, I am using pvvar function to obtain this. But in excel when I try to verify the result using NPV function, the results do not match. Example: In Excel x= NPV(0.1,1000,2000,3000,400) gives 5089 In Matlab x=pvvar([1000 2000 3000 400],0.1) ret... 14 Apr 2010 23:22

Can I get my sound card to trigger data acquisition from another DAQ card?
I am trying to get an external audio signal to trigger 2 second data acquisition within Matlab. ie.. the audio is a stimulus, which also signals for matlab to begin recording EEG responses to the audio. Currently I have the audio signal connected to the 'mic in' of the windows sound card, while the EEG signals go t... 9 Apr 2010 00:09