Matlab

Drawing a Line thru Incongruent Data Points
I need to draw a line between data points so that I can get a "Data Fitting" linear or polynomial equation. This will not draw a line between data points even if I have '-b' in the plot. ra(1900)=1*15+22.6/60 ra(1950)=1*15+48.8/60 ra(1990)=2*15+21.3/60 ra(2000)=2*15+31.8/60 ra(2010)=2*15+43.... 3 Aug 2010 11:25

How to close a figure without critical error
Hi, I wrote a program for viewing 4D images (x,y,z,t), one at a time. The user uses the left and right arrows to scroll through the z dimension, and the up and down arrows to scroll through the t dimension. The problem is, I cannot figure out how to make it so that given a certain keystroke (for example, pressin... 6 Aug 2010 15:58

fzero with two variables
Hi, I need to find the value of an input that makes an equation equal to zero. I realized in my data that only making fluctuate one variable is not enough and sometimes fzero is not able to fin a zero. Is there a way to make fluctuate two variables for this optimization function? Here, only H is varying and... 3 Aug 2010 14:44

Load in part of variable from .mat file
I would like to know how to read in part of a variable from a .mat file. My problem is this: I have a .mat file with a variable which is, say, 12000 x 73 x 144. It is much less memory intensive to do my analysis using a portion of that data... so right now I am reading in the entire variable, keeping the first 2000 ... 3 Aug 2010 11:25

fsolve Problem with 2 non-linear functions
Hello, I am basically trying to convert an American Option to a European Option by inverting Barone-Adesi and Whaley as described in the Paper "Determining the implied volatility for American options using the QAM" - Kutner (1998). I successfully implemented the code using the Newton-Raphson Method for 2 equations, ... 3 Aug 2010 10:19

fast image comparision
sir, i will be having around 30 black and white pictures in tne database.. after that i will capture a b/w image and i need to compare it with the stored images.. and if there is any match i should be able to recognise that.. there is no need of checking the images by rotating them or something like that.. just... 9 Aug 2010 13:26

tutrial on time series deomposition with matlab
Hi everybody I have a time series which I would like to decompose into a trend, one or more seasonal signal and a noisy signal. all this with matlab. I managed to extarct the trend, but for the two others part I am struggling a lot so could anybody give me some advises on how to do that with matlab? some easy to ... 3 Aug 2010 10:19

matlab in JAVA or java in MATLAB?
Hi guys I am now experencing a great difficulty in the interation between java and matlab. I have an objective function written in JAVA with has method return an numerical number, i call it 'profit'. The nature of this obtive function (ObjFun.java) is that it takes an parameter input, say C, with different C valu... 5 Aug 2010 05:53

Simulation error for referenced model
Hi everyone, I have created a S-function and have inlined it by creating a corresponding TLC file. I had to do it because that S-function is used in a lot of models, and those models constitute a complex model reference hierarchy (all referenced in Accelerator mode to enable multiple instances possible). Anyway... 3 Aug 2010 09:13

curve fitting with finite differences calculation
Hello, I am new to matlab and I would like to know whether there is a way to use a finite differences calculation to fit a curve (least square) of experimental data. Unfortunately there is no analytical solution to my problem and adjusting parameters by hand is quite exhausting. I would be grateful for any help and ... 4 Aug 2010 03:50