Matlab

Matlab sine wave
Hi people of mathwork and Engineering Take a look at this question Given the sin of 0 to (-90) degrees in 1 degree increments (below), write a program to printout the sin, cos or tan (or all) of any angle to within 1 degree. You cannot use any built-in trigonometric functions, you must write your own functions usin... 19 May 2010 16:00

Interp1 function
Hey matlab community, Question. I currently am using the interp1 function when interpolating data being read from a couple of files. Everything seems to work fine accept when I am trying to print the graph values. The graph is printed out fine, able to output Min and Max. However, usually when I try to print... 19 May 2010 17:08

Matlab keeps rounding up when I need decimals
I have the following code. I'm reading in data, mostly doubles, from a text file and trying to process it, however the last line of the code gives me all integers when I need to have decimal places for the doubles. fid=fopen('TR11b.tsv'); index=textscan(fid,'%u %*s %*s %f64 %f64 %*s %u %u','headerlines',1); fclose... 19 May 2010 14:53

Sending data without the Data Acquisition Toolkit
I am trying to build a device to turn on/off both a laser and a voltage source. I am hoping to use a piece of hardware such as the NI USB 6008 (http://sine.ni.com/nips/cds/view/p/lang/en/nid/202751) to send data bits to turn on/off these devices, and I was wondering if it is necessary to have the Data Acquisition Tool... 19 May 2010 14:53

clock/phase recovery for PSK modulated data in Matlab
Hi all, I've collected some real-world PSK modulated data that I'm trying to demodulate/downsample/decode in Matlab using the Communications Toolbox. The problem is that the transmitter and receiver clocks aren't locked, so there is 1) a phase difference in the two and 2) the upsample rate isn't an exact integer. ... 1 Jun 2010 14:10

Attempted to access indexEnd(1); index out of bounds because numel(indexEnd)=0.
Hi, I am trying to run this code: function [ExtraOut] = SteadyStateStrainRateExtraOut(timedata,straindata), %This function assumes data is in the format (zereod time, strain) %and is coming from SeparateColumns or SeparatePKVYColumns. make sure %fatigue strain is peak strains % Length of the array. a = len... 19 May 2010 14:53

xPC target for electric motor control
I am trying to use xPC Target as a rapid control prototyping solution for electric motor control. Specifically I am trying to use NI hardware for PWM generation, analog inputs, and reading an incremental encoder. The blocks for the encoder look fine, but I forsee problems with both PWM generation and the analog input... 19 May 2010 13:47

PSO toolbox for latest Matlab versions
Hi George, I looked at your work on a new PSO toolbox as explained in your thesis and also the toolbox documentation provided on your website. I did not find any mention of the version of Matlab you used to implement the toolbox. Can you please specify the version of Matlab you used successfully with your PSO toolbo... 19 May 2010 18:14

Free memory and computation time
Hi, which of the following is faster. I have two options. for i=1:100 for j=1 to 20.000 Calculate lala 8X8 matrix use values of lala matrix end end or calculate once lala and store it as a 3d matrix like lala(8,8,20000) and for i=100 use values from lala matrix end I am doing some... 24 May 2010 04:44

Training of neural network using genetic algorithm
If i want to train a feedforward neural network with genetic algorithm then what will be the code? simply i want my weights to be selected by genetic algorithm and then train the neural network what will be the procedure?? how to cascade two defferent toolboxes?? ... 19 May 2010 13:46