Matlab

Fitting data and then accessing sse, rsquare, dfe, adjrsquare and rmse values
I have a fitting program where I am fitting gaussian curves... After fitting these I want to access the sse, rquare, dfe, adjrsquare and rmse values. I'm unsure of how to do this. I have the values displayed in terminal, but they are all incorporated into a goodness of fit value, gof, and include text... This ... 28 Jun 2010 17:15

meshc logplot
Hey all, I am using meshc to plot a function z=f(x,y). Can someone tell me how to make the z axis a log scale? ... 30 Jun 2010 14:14

how can I solve wave equation using pdetool box
hello, please I want to know how can I use pedtool for solving wave equation for example , and I wonder if there is an example for using pdetool in fracture mechanics. thank you ... 29 Jun 2010 01:59

replace object properties
"Ahmad" <ahmad.humyn(a)gmail.com> wrote in message <i0at44$mih$1(a)fred.mathworks.com>... Yeah I tried subclassing from the handle class, but that has no effect on replaceVals(). I think this wouldn't work: obj = new_obj; inside the obj's method. Probably I need to set each variable individually. Just that ... 28 Jun 2010 16:09

Difference between the trust-region-reflective algorithms in fmincon & nonlinear least squares
I have a bound constraint non-linear least squares problem min||f(x)-y||_2 x with l<=x<=u I found that solving this problem with lsqnonlin using trust-region-reflective method is much much faster than with fmincon using the same method. What is the difference between the implementation of these two methods? ... 28 Jun 2010 16:09

netcdf.open problem
I'm using R2009b version and I installed mexcdf.r3170.zip from http://mexcdf.sourceforge.net today. Even after using addpath for this mexcdf subfolder, netcdf.open is not working. I even tried to use MATLAB functions (netcdf or netcdf.open) without using additional mexcdf or ncx files. However all I got is just a nu... 30 Jun 2010 10:51

approximating the derivative of an array
Hi, I have an array of numbers, for example x = [1 2 3 4 5]. I want to find the (approximate) derivative for array x. On the MatLab site, a suggestion to approximate the derivative looks like this: y = diff(x); derivative = diff(y) ./ diff(x) However, since diff(array) shortens the length by 1, the top and b... 28 Jun 2010 16:09

replace object properties
Yeah I tried subclassing from the handle class, but that has no effect on replaceVals(). I think this wouldn't work: obj = new_obj; inside the obj's method. Probably I need to set each variable individually. Just that it will be really messy once I have lots of variables. Thanks again us, ... 28 Jun 2010 16:09

approximating the derivative of an array
Hi, I have an array of numbers, for example x = [1 2 3 4 5]. I want to find the (approximate) derivative for array x. On the MatLab site, a suggestion to approximate the derivative looks like this: y = diff(x); derivative = diff(y) ./ diff(x) However, since diff(array) shortens the length by 1, the top and b... 28 Jun 2010 16:09

boundary conditions for diffusion from a sphere
I'm trying to get a numerical solution for the mass diffusion from a sphere into a fluid of finite volume, analagous to thermal diffusion in the cooling of a sphere in a well-stirred solution. The problem I am having is that I cannot apply the right boundary condition in pdepe to represent flux from the sphere into the... 22 Jul 2010 13:35