[matlab] Forum Topics

I've been learning a lot about machine learning (mostly clustering and regressions), but when I've looked into programming libraries/environments, I've found "production ready" ones to be few and far between. What I mean by "production ready" is that it could be incorperated into a product, not just used a tool …

Hello! I'm trying to transform working Python code to Matlab code. It's Simpson's rule. But MatLab code is not working. What should I change for in this code? Python: from math import sin def f(x): return ((0.6369)*sin(sin(x))*sin(x)) def method_simpson_compost(f,a,b,n): h = (float(b)-a)/n i = 0 fks = 0.0 while i<=n: …

I applied neural network toolbox to create a multilayer feedforward network. The data is a huge csv file which maps to three outputs. data = load('Train.csv'); Input= data(1:31012,1:40); Output=data(1:31012,41); %net = newff(minmax(Input),[1000,1000,1000]); net = feedforwardnet(10,'trainlm'); view(net) y = net(Input); perf = perform(net,y,Output) but this code always gives this - "Empty …

I have an application thats has been coded in C#. After build it generates a standalone dll file and the exe file. I want to use this code in Matlab. I found out from [this](http://www.mathworks.co.uk/help/matlab/matlab_external/using-a-net-object.html#bshoa6b-1) page that I can load the C# classes or codes into Matlab. dll_in_matlab = NET.addAssembly('location …

Here is the mex code I wrote to read in a tab-delimited file. The mex file got created but it causes my MATLAB to end abruptly and give the following error. Can anyone help me where I am going wrong? Please let me know if any further information is required …

I am unable to convert my C file to mex file. Here is the C file I wrote to read in a tab-delimited file. The C program in running, but I am not able to successfully convert it to a mex file. I have also pasted the mex file I …

I am trying to plot a graph in matlab using c++. But the matlab is only giving me an empty graph. void portfolio::viewGraph() { double value[20]; //store portfolio value double time[20]; //store time int i=0,j=1; double cash,p; ifstream in_file("transactionhistory.txt", ios::in); string c; while(in_file>>cash>>p>>c>>c>>c>>c>>c) { value[i]=(p+cash); cout<<p<<endl; time[i]=j; cout<<time[i]<<endl; i++; j++; …

Hi.I have an image(A) and encrypted image(B) .I want to find correlation coefficient for(Horizontal,Vertical,Diagonal) A(~1)and for B(~0)is there any function in matlab for this ?I know corr2 is for calculating the correlation coefficient for two images.but for one image?

1. Given a length of wire P units long, where P is an integer, it is possible in some cases to bend the wire into an isosceles triangle(with two sides equal) where the lengths of all the sides are also integers. For example a wire of length P = 3 …

I am in a small doubt of how to proceed to the next stage. 1. I have used im2col which basically turned gray-scale image into vector. 2. I have used the function vector quantization lbg algorithm which gave the VQ codebook as the output. I understand that the image I …

Hello all!! I am new to MATLAB and am trying to do multidimensional scaling for some data I have. It is just a 24x24 correlation matrix and I keep getting an error message that it is not a square matrix, but it is!! I don't understand :/ I've been following …

I have a variable x which varies from -160 to 160 through steps of 10. `x = -160:10:160;` I have a matrix T1 which is of the form ` cos(x) 0 +sin(x) 0.00; sin(x) 0 -cos(x) 0.00; 0.0000 1 0.00000 0.67; 0.0000 0 0.00000 1.00 ` How can that be …

i am making program to read text by convert image of text into text but i have problem in the out because the text not in line but in column and i can't detect space between words . the code in matlab: load 'Charachters.mat'; str ={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','1','2','3','4','5','6','7','8','9','0',' '}; f = imread('1.PNG'); …

hi i need help in design scheduling in wimax network using matlab. is there anyone can help me?

hi, is it possible to collaborate matlab and c#? if yes..how do you do it? and will the application be able to run on windows phone 7?

Hi Everyone Re; Help with MATLAB...basic stuff Let me start with..."What the heck have I let myself in for???? " I'm 43 years old Haven't studied anything related to math in 10+ years. Enrolled in University via distance education in Australia. I live in a small town in Queensland's outback. …

I need to implement an algorithm for automatic modulation recognition using matlab. I am planning to do this by using pattern recognition, I have read about the decision tree approach, it says to "ideniify the constant envelope signals (CW, FM, FSK). PSK sigals are not considered as constant envelope signals, …

i have a **java program** and it call **matlab exe file** ,but i have a problem in run time it is so so slow . i need a help in how to make this faster, i will be grateful for any help...plzzzzzz rply

I am writing a m-file that simply takes in a picture of a board with 27 LEDS on it and simply tells you which LED is lit up. My problem is with the calibration of the m-file. I am trying to use [x,y] = ginput(27) to have the user click …

Hello, I am having difficulty writing a function file that produces an echo to a .wav recording I made. How do you create one? Thanks!

Hi can anyone help me I am using the following code to import data from spread sheet file and plot data- everything working perfect,it plotting one set of data here [B]v=xlsread('table.zn','B2:B20') plot(fliplr(v))[/B] the only thing- I need to plot 2 various set of data on same graph e.g I want …

I am developing the Django application which runs the Matlab code and create some txt and png files on the server.when I run these below python command on server, it works fine but when I try to run from the server (it is coded in Viewspy).It shows file is updated.(from …

I am trying to color some alphabets in a string based on input alphabet given. suppose string: [B]AUSTRALIA[/B] INPUT: [B]A[/B] OUTPUT: [B][COLOR="Red"]A[/COLOR]USTR[COLOR="red"]A[/COLOR]LI[COLOR="red"]A[/COLOR][/B] Can anyone suggest me how to achieve it ? As m new to this.

Hi, I'm using Matlab 2011a and VS 2010. I have to call Matlab functions in my project. The problem is that I can't seem to find a solution works with my Matlab version. Has anyone succesfuly integrated Matlab 2011a with c#?

Dear all, Perhaps a bit of random one, but does anyone have an experience of using the surface fitting toolbox in MATLAB? My specific problem is that I have fitted a polynomial to a surface which is a good fit in this instance (r squared >0.99); fitting using interpolant will …

[B]Product[/B]: [B][COLOR="Red"]Matlab, Simulink[/COLOR][/B] [B]Problem Statement[/B]: Complex feedback loops implying usage of Unit Delay Block. At certain simulation frame calculation of required values for test generation is becoming complex. Is there a way to override the Unit Delay block output without changing the model (as I am not allowed to do …

Hello all, I'll hopefully be attending a cognitive neuroscience PhD program next fall and I'd like to learn some programming beforehand (having programming skills helps for lots of neuroimaging labs). Labs I've worked in used UNIX, MATLAB, and E-Prime (visual basic) and I'd really like to improve my knowledge before …

I am trying to solve a system of 5 equations in 5 unknowns. I am new to the Matlab language. I consulted the documentation and decided that the best way of doing this was to use the solve() function. However, this function does not appear to work properly for 5 …

Hello, I have a problem with the atan2 function. I have 2 programs, one in C and one in Matlab. Both have an identical implementation. My problem is that I am getting occasionally different values from the atan2 function in C and Matlab. For instance: x=0.29695007709080329 y= -0.96764419257510348 Matlab atan2= …

Hows it going guys, I just had a question, which I think is simple, but I cant seem to get my head around to the solution. I have a Signals Processing lab coming up on modulation and demodulation. Anyway to cut to the chase, one part of the system requires …