Matlab

Virus Transport equation
Hello sir/Ma'am, As a part of a research project, I have this Virus transport equation that I have to solve first in 1D and then in 2D using finite difference scheme. I am using Crank Nicholson Method. Please help me as I am stuck. I know I can implement in finite element using PDEPE but I need to do it in finite di... 21 May 2010 11:41

Clear an axes
Hi , How can I delete images that are displayed on an axes when a button is pressed ? I mean I want to clear the axes from all images. Thanks ... 21 May 2010 11:41

Matlab Memory Leak
I use the GADS toolkit with Matlab, and the operations freeze up after a certain number of evaluations. It always occurs after about the same number of fitness evaluations (tested with different seeds and variables). The fitness function involves a fair number of heavy matrix calculations but there is enough memory on ... 21 May 2010 10:35

How to locate a pair of Lon and Lat on a certain map
Hi there, I have a pair of Lon and Lat and I would like to know which state it belongs to on a certain map, for example, USA map. Therefore, the return value should be a state name. How can I achieve this? Can anyone help? Thank you, Tianchan ... 23 May 2010 10:16

AR(1) model (autoregressive process)
Hi I have been trying to use the 'filter' function in matlab to produce a AR(1) signal. If I generate the input white noise array (x), how do I obtain positive coefficients to produce to output signal, AR(1)? I understand that the 'aryule' function amoung others can give you the coefficients, but you need the A... 22 May 2010 06:13

fnplt and plotyy
hello. i have a spline as output by the spaps of the spline tool box. I also have two vectors, X and Y. I wish to plot the lot on one graph. Normally I would use plotyy. However, in order to plot the spline, I have to use fnplt. I do not think plotyy supports fnplt? I would like to do something like: plotyy... 21 May 2010 10:35

Rotate axis label (not ticks)
Hi I have the following code j=ylabel('q_y') pos = get(j,'pos'); % Read position [x y z] set(j,'pos',pos+[.35 3.4 0]) % Move label to right which moves my y-axis label upwards. Now, per default it is rotated - how can I rotate it back? Best, Jim. ... 21 May 2010 09:29

Import .txt file
Hi, I am new to Matlab. I want to import and plot data from .txt file into Matlab. the txt file has multiple columns so I would like matlab to go into the directory and upload the data and plot it. I want to be able to do this from a gui. any help? Thanks Jerry ... 21 May 2010 09:29

Can't import Netcdf variable with unlimited dimension correctly
Hi, When I read in a variable with a unlimited dimension from a netcdf file, the variable is not imported correctly. The variable will show zeros inserted alternatively along the unlimited dimension. If a netcdf variable is a 4x2 matrix with the first dimension being the unlimited dimension, eg 2 2 1 4 5 2 ... 21 May 2010 09:29

What's the fix with the loop counter?
Hi folks, strange things are happening. Acc to hlp "for x=initval:endval, statements, end repeatedly executes statements .. counter variable x is initialized to value initval and automatically increments by 1 each time through the loop " .. I used to use it precisely this way and all went fine. Now, what happened... 21 May 2010 13:53