Matlab

JOB
I have about 7 monthsto stay at home, I need anyjob that will keepmebusy before i go back to school. ... 23 Mar 2010 13:37

eigs function for large matrices
Hello, I am computing the 50 first eigenvalues of large matrices (about 140,000 x 140,000) that are symmetric and definite positive (mass M and stiffness K matrices obtained with finite element method). [z,w]=eigs(K,M,50,'sm'); Something surprises me with the results. While the eigenvalues seem correct (compar... 24 Mar 2010 04:23

Optimisation of a group
Dear all, I have a dataset that contains individuals from different age brackets. I want to create a program that select the biggest possible group of individuals that obeys certain optimisation rules. For example, I want to determine, from my dataset, the largest group possible that obey the following: Target... 24 Mar 2010 12:19

spectrum sensing by energy detection
need matlab code for spctrum sensing using energy detection technique for cognitive radio ... 23 Mar 2010 12:27

spectrum sensing by energy detection
need matlab code for spctrum sensing using energy detection technique for cognitive radio ... 23 Mar 2010 12:27

Fitting data to an enclosed curve
Hi everyone: I am fairly aquianted with MATLAB but new to its curve and data fitting features/toolboxes. I have a set of x,y,z data that I need fitted to the following equation: z + a*x + b*x^3 + c*y + d*(x^2)*y = 0 I am trying to find a set of coefficients (a,b,c,d) that best fits the x,y,z data. In playing w... 23 Mar 2010 12:27

lsqcurvefit
I am quite new to matlab.I got a set of xdata,ydata and zdata is it possible to use lsqcurvefit to perform a curvefit?Thanks ... 23 Mar 2010 12:27

Bug/glitch in transparent patch plotting
Hi, I'm having some trouble plotting (semi-)transparent patches. The problem is occuring in a more complicated plot, for which I'm having trouble recreating the exact problem, but here is a simpler version (partially) demonstrating the issue. % patchbug.m figure(); clf grid on z = -1; ph = patch([-5 -5 5 5],[... 23 Mar 2010 12:27

question about subscript and title command
Hi, I am trying to use the title command to add title to the figure. However, since there is an underscore in the title, the text following the underscore is changed to subscript. What should I do if I do not want the text following the underscore to be changed to subscript? Thanks, -James ... 23 Mar 2010 12:27

matrix inequations and optimization
how can i perform optimization using matrix inequations where the expression in the inequation involves lots of variables and operations on those variables....??For example: Consider a matrix M= [A*3 B*4 C*(2+ i )] [D*(6+i) E*5 F*(6) ] ... 24 Mar 2010 06:35