Matlab

select features
i have extracted features from an image i-e SIFT features from this link http://www.cs.ubc.ca/~lowe/keypoints/ now i have features in a matrix. now i want to Firstly Select top most feature (at thr right side of image) and bottom most feature (at the right side of image). than draw a line between these two feature... 27 Jul 2010 10:36

help for Forward rectangular rule in matlab
Hi i have implemented Zero order hold, pole zero match and others by c2d command but i am unable to implement forward and backward rectangular rule for transfer function (10s+10)/(s+10) Can any body write a code for me for any one of rectangular method. c2d command does not support them. Thanks ... 27 Jul 2010 09:30

Help needed about numerical integration in matlab
Hi everyone, I am trying to integrate the following function from 0 to infinity numerically in matlab: f(x)= (x/(2*l*s))^0.5*(l-1) * (exp(-0.5*(x+2*l*s))) * besseli(l , sqrt(2*l*s*x)) * ... gammainc(x , l)^(N-1); My Matlab code is: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% N = 20 ; K = 30; l = round(K/N); s = 30 ; ... 27 Jul 2010 11:43

simplify
Dear people, the expression m1*(-sin(q0)*(-cos(q2)*d1-cos(q6)*d4)+cos(q0)*sin(q1)*(sin(q2)*d1+sin(q6)*d4))^2+m1*(cos(q0)*(-cos(q2)*d1-cos(q6)*d4)+sin(q0)*sin(q1)*(sin(q2)*d1+sin(q6)*d4))^2 can be simplified to (-cos(q2)*d1-cos(q6)*d4)^2+sin(q1)^2*(sin(q2)*d1+sin(q6)*d4)^2; (m1, q0,q1,q2... are all symbol... 27 Jul 2010 12:49

mxarray pointer
hello , i am using mxGetPr for Double type.but what am i supposed to use for int data type. for example mxArray * mx = mxCreateNumericMatrix(1,1,mxDOUBLE_CLASS,mxREAL) *mxGetPr(mx) = 1 mxSetFieldByNumber(outarray, j,i,mx) if i want to use the same type of code for numeric Matrix for data type mxINT32_CL... 28 Jul 2010 07:26

Counting the number of data points in a plot
Good day, I'm plotting a series of graphs from data in a .dat file containing thousands of data, some positive, some negative in value. I want to put an label/annotation indicating the percentage of points that are positive and negative. Any suggestion will be helpful. ... 27 Jul 2010 10:36

Connecting Agilent PSA & PSG to MatLab
Hello All, I'm having major issues with connecting a PSA & a PSG to MatLab. I've got VISA installed & the Agilent I/O suite, however when I try to connect the instrument the app does not "see" the analyser through the direct LAN cable connecting the two together. I'm not sure what settings the instruments need to... 27 Jul 2010 12:49

Polynomial Multiplication
Hello, I have such a polynomial P(x,y) = Q(x)*R(y) +S(x)*T(y) with Q,R,S and T some linear polynomials. I would like to get the coefficients of P(x,y)^n with n a given integer. Is it possible to get these coefficients with Matlab ? I know that you can get the coefficients of A(x)*B(x) using conv. But what a... 27 Jul 2010 09:30

Display formats
When I get a output from a function it is giving as 4.5036e-5, but I would like to convert this to 0.000045036. How to do it? Than you, Best Regards, Paheerathan ... 27 Jul 2010 08:24

How can get the integral of surface in 3-D
Dear all, Is there someone know that MatLab can work on surface area calculation or cannot? I have 3-D surface of fuction z = sin(x)cos(y)+sin(3x)cos(3y)/9. I need to know the surface area above a certain x-y region. How can I get the surface integral from MatLab? -- Thanks ... 27 Jul 2010 10:36