Matlab

Have fminunc show all finite-difference derivatives?
Hey everybody I'm working with fminunc() to optimize a given likelihood function. I provide the gradient and use the large-scale algorithm. It seems I have a problem in my gradient, because the CheckDerivative option tells me that the maximum relative discrepancy between derivatives is very high. I suspect th... 15 Jul 2010 12:03

how to read data from serial port using matlab in pc
how to read data from serial port using matlab ... 15 Jul 2010 13:10

Clear multiple axes at once in a GUI
Hello, I have a GUI plotting multiple axes which all overlay one another to look like one plot on a GUI. I have a "CLEAR" button which I want to clear ALL of the axes and ALL legends inherent to those axes. The axes are referred to as members of an array: handles.data_axes(1) handles.data_axes(2) handles.data_a... 15 Jul 2010 15:24

Problem with using svmtrain() function
Hey I am trying to use SVM too and I am stuck, I create a training set and I calculate the descriptors and the keypoints for all the imges, but I do not know how to use the svmtrain to check the accuracy of the matches, can anyone help me?? ... 15 Jul 2010 07:40

Optimal Fit of a Non-linear Function.....parameter output?
Hi, I'm using FMINSEARCH and FITFUN to optimise a double exponent curve fit: http://www.mathworks.com/products/matlab/demos.html?file=/products/demos/shipping/matlab/fitdemo.html The prob is that I have been trying, so far unsuccessfully, to find a way for FMINSEARCH to output the constants (c1, c2) generated ... 15 Jul 2010 14:17

How do I reduce this to one line from two lines?
Hi Everyone, I it possible to reduce the following to a single line? A = max([firm_profit(:,t),firm_price(:,t)]) B = A(1,1) Kind regards, Ulrik. ... 15 Jul 2010 13:10

A question about usage of "from workspace" block in Matlab.
Could you post any simple example about usage of this block (From workspace) in simulink?I have read its help in matlab but I couldn't succeed. For example I have a sinusoidal signal which is produced by these codes; t=0:0.01/50:10/50; y=sin(t*pi*2*50); I want to see this signal at Scope in Simulink.How can I... 15 Jul 2010 06:36

pid control
plz need to help me to creat a pid control with one input two outputs in m file work space and another one by two inputs two outputs thanks ... 15 Jul 2010 09:51

Error using ==> mupadmex
In a m- file which have more than 700 lines using syms when run show this massage ??? The following error occurred converting from sym to double: Error using ==> mupadmex Error in MuPAD command: DOUBLE cannot convert the input expression into a double array. If the input expression contains a symbolic var... 15 Jul 2010 09:51

Variable name dynamically changing [really noob]
Hi guys, a real basic question I guess. But I didn't had a course on that and I'm learning on my own. I have four matrices, whose (1,1) elements are, say: YtransMatrix_0(1,1) = 0; YtransMatrix_1(1,1) = 1; YtransMatrix_2(1,1) = 2; YtransMatrix_3(1,1) = 3; I want to create one matrix with the first column be... 15 Jul 2010 12:03