matlab

Multiple GUIs in Matlab using GUIDE

I want to plot of data generated through push button action on one GUI into another GUI's axes object. Please let me know how can i do that? ...

MATLAB: comparing 2 columns content

hi, I need to compare the content of 2 tables, more exactly 2 columns (1 column per table) in Matlab to see, for each element of the firsts column, there is an equal element in the second column. Should I use a for loop or is there any MATLAB function doing this ? thanks ...

radio button group matlab

i have two set of button groups. first button groups has two radio buttons and second group has four radio buttons. if button 1 is selected in group1 and any one from the group 2. similarly for button2 in group 1 and any one from group2, respective function calls must be made on click of push button with these combinations. how to do it...

Can't compare the norm of a vector to 1 in matlab

I'm trying to find out wether a matrix is orthonormal. I begin by checking if the vectors are normal by doing for j=1:2; if norm(S:,j) ~= 1; return; % Not normal vector end end But when norm returns 1.0000 comparing that to 1 is true and the function returns, which is not what i want. Any ideas? Thx ...

MATLAB plot inside a loop

I am doing something like this: a = [1:100]; for i=1:100, plot([1:i], a(1:i)); end My issue is that the plot is not shown until the loop is finished. How can I show/update the plot in every iteration? ...

Programmatically configure MATLAB

Since MathWorks release a new version of MATLAB every six months, it's a bit of hassle having to set up the latest version each time. What I'd like is an automatic way of configuring MATLAB, to save wasting time on administrative hassle. The sorts of things I usually do when I get a new version are: Add commonly used directories to t...

How can the crosshair of ginput be restricted to one plot?

I wrote a small MATLAB program with a gui. Inside the gui I have, among other things, a plot in which the user should be able to select two points. For this I use the function ginput, which creates a crosshair for selection. Unfortunatley the crosshair extends the whole window and is not restricted to the plot, which doesn't look nice an...

Matlab GUI: How to Save the Results of Functions (states of application)

Hi, I would like to create an animation which enables the user to go backward and forward through the steps of simulation. An animation has to simulate the iterative process of channel decoding (a receiver receives a block of bits, performs an operation and then checks if the block corresponds to parity rules. If the block doesn't corr...

Iterating through struct fieldnames in MATLAB.

My question is easily summarized as: "Why does the following not work?" teststruct = struct('a',3,'b',5,'c',9) fields = fieldnames(teststruct) for i=1:numel(fields) fields(i) teststruct.(fields(i)) end output: ans = 'a' ??? Argument to dynamic structure reference must evaluate to a valid field name. Especially since teststru...

"Invalid Handle Object" when plotting 2 figures Matlab

I'm having a difficult time understanding the paradigm of Matlab classes vs compared to c++. I wrote code the other day, and I thought it should work. It did not... until I added <handle after the classdef. So I have two classes, landmarks and robot, both are called from within the simulation class. This is the main loop of obj....

How do I make matlab legends match the colour of the graphs?

Here is the code I used: x = linspace(0,2); e = exp(1); lin = e; quad = e-e.*x.*x/2; cub = e-e.*x.*x/2; quart = e-e.*x.*x/2+e.*x.*x.*x.*x/24; act = e.^cos(x); mplot = plot(x,act,x,lin,x,quad,x,cub,x,quart); legend('actual','linear','quadratic','cubic','quartic') This produces a legend matching the right colors to actual and linear, t...

How to efficiently replace a vector of ids by a vector of corresponding numerical values

Assuming a vector (or matrix) of ids > 1 2 3 3 2 Let's suppose each of these ids corresponds to a numerical value, stored in another vector 14 33 25 I'd like to replace the ids by their corresponding value to build the following vector 14 33 25 25 33 There must be a simple way to achieve this without resorting to loops,...

problems in trying ieee 802.15.4 working from msk

Hi, i took a msk code from dsplog.com and tried to modify it to test the ieee 802.15.4. There are several links on that site for ieee 802.15.4. Currently I am getting simulated ber results all approximately same for all the cases of Eb_No values. Can you help me to find why? thanks in advance! clear PN = [ 1 1 0 1 1 0 0 1 1 1 ...

MATLAB: vectorized array creation from a list of start/end indices

I have a two-column matrix M that contains the start/end indices of a bunch of intervals: startInd EndInd 1 3 6 10 12 12 15 16 How can I generate a vector of all the interval indices: v = [1 2 3 6 7 8 9 10 12 15 16]; I'm doing the above using loops, but I'm wondering if there's a more elegant vec...

matlab's phi symbol

Not that significant, but annoying to no end. Why does matlab has no small phi (\varphi) symbol ? It has pretty much all other symbols LaTeX offers, but not this one. Why ? I may be wrong of course, in which case would be delighted if someone could prove me wrong... ...

ECG simulation using MATLAB

How do you write a function for adding baseline artifact noise and high frequency noise to the simulated ECG signal. ...

Could not determine the size of this expression.

Hi, I have resently started to use MATLAB Simulink, and my problem is that i can't implement an AMDF function, because simulink compiler cannot determine the lengths. Simulink errors: |--------------------------------------------------------------------------------------- Could not determine the size of this expression. Function 'Embe...

How to concatenate a number to a variable name in MATLAB?

I have a variable a = 1. I want to generate a variable name of the form: variableNumber so in this example, I would want a1 a2 a3 as variables. How can I do that? ...

Plotting a grouped 2 dimensional vector in MATLAB

I am trying to make a plot of a 2-dimensional vector (2D Plot). But I don't want all the datapoints to have the same color on the plot. Each datapoint corresponds to a group. I want to have different colors for each group of datapoints. class=[1 3 2 5 2 5 1 3 3 4 2 2 2] says each datapoint belongs to which group X=[x1,y1;x2,y2;x3,y...

How to access a matrix in a matlab struct's field from a mex function?

I'm trying to figure out how to access a matrix that is stored in a field in a matlab structure from a mex function. That's awfully long winded... Let me explain: I have a matlab struct that was defined like the following: matrixStruct = struct('matrix', {4, 4, 4; 5, 5, 5; 6, 6 ,6}) I have a mex function in which I would like to be...