Matlab

Matrix Algebra: inverse
Hi, I have a matrix algebra question. I have a unkown 1x9 vector A (which is value for each security) and a known 8x9 matrix B (which has key rate DV01 for each security. And I also have another 8x1 vector C. To solve for A, B*A'=C A'=inv(B)*C A=(inv(B)*C)' But the problem is B is not a square matrix and cou... 21 Jul 2010 12:26

Find coresponding values in two matrices
Hello, I have two matrices I and R, i want to find values that are equal to a certain value in I and then find the values at the extracted locations in R as well. I am using the following code: [r,c]=find(I==cut_off_val); to extract values from I (3xn) but find does not traverse row wise it traverses colu... 21 Jul 2010 11:20

How to detect what and how many classes in dataset in statistic and/or prtools
I have already set the path to the prtools toolbox and followed guidance from the newsgroup i.e John D'Errico group list. In the reply message posted, John suggested to put the current working directory at the top of MATLAB search path. My plan is to use together the dataset frm statistics tool and getsize frm prtools... 21 Jul 2010 09:08

Separation of time serie in trend
Hi, I have those two matrices : M = [0,0,0,0,0,0,-1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,-1,-1,-1,0,0,0,0,0,0,1,0,0,-1,0,0,1,-1,1,-1,0,0,1,-1,0,0,0,0,0,0,1,-1]' Index = [32,86,137,145,209,262,484,638,660,765,823,970,984,1140,1212,1291,1375,1383,1458,1544,1595,1668,1738,1852,1886,2034,2070,2232,2364,2418,... 21 Jul 2010 09:08

plotting charts in excel from matlab
Hello, Problem1 -------------------------------------------------------------------------------- I am trying to make a chart in excel from matlab. I downloaded an example shown below: % White Background, Border off co.Chart.PlotArea.Interior.ColorIndex = 0; co.Chart.PlotArea.Border.LineStyle =... 21 Jul 2010 18:01

Fingerprint Identification for Attendance
What is the best approach for the system? How to integrate it with Excel? ... 28 Jul 2010 12:57

How to find lost pointers to memory blocks
Hi All, How can I retrieve lost pointers to memory blocks. E.g. when my application crashes, I lose my pointers to the memory blocks, which results in memory leaks. How can I get those pointers back to free the memory. Thanks in advance, Kees. ... 21 Jul 2010 09:08

plotting points in different colours
I've got... for k=1:K for m=(((k-1)*M)+1):(k*M) plot (X(m,2), X(m,3), '*') end end I have N points that I'm plotting and M=N/K. I want to plot each group of points in the same colour. So for example if K=3 I might want the first N/3 of the points to be red and then the second N/3 to be blue... 22 Jul 2010 09:12

fwrite question - Write header at the end of the procedure
Hi All, I want to write the header at the end of the procedure, because only then I know the exact content of the file. So I came up with this: (simplified but it reflects the core) ================================================== FileName = 'C:\Test.bin' fid = fopen(FileName, 'a', 'l'); Header = cast([0,0,0... 21 Jul 2010 16:55

haar wavelet transform
How to Decomposition of the image using Haar wavelet Transform ?any one can help to me? ... 21 Jul 2010 09:08