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Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

6 years ago

Question

National Instruments DAQMX function support in matlab

Hi, I have a national instruments PCI-DIO-32HS digital card and I'm trying to use matlab's data acquisition toolbox. I have D...

8 years ago | 0 answers | 0

### 0

answersQuestion

Logical indexing with matrix issue

I ran into this issue writing a program using logical indexing. Suppose you have A=ones(32,10); M=zeros(32,10); N=one...

8 years ago | 1 answer | 0

### 1

answerQuestion

Is it possible to vectorize this loop?

Hi, I've been trying to figure out a way to optimize this bit of code by vectorizing the loop. I can't find a good way to do ...

8 years ago | 2 answers | 0

### 2

answersQuestion

Indexing to subtract sections of an array

Hi, Say you have an 1x80000 row vector and need to subtract by blocks of 64 every so many elements. For example A = rand...

8 years ago | 4 answers | 0

### 4

answersQuestion

Caught unexpected exception of unknown type TCP/IP device connection

Hi, I'm trying to connect a Newport XPS motion controller to Matlab via TCP/IP. I'm running 64bit 2012b on win7 64bit. The code...

8 years ago | 0 answers | 0

### 0

answersQuestion

loadlibrary error with 64bit dll and header

Hi, I have three 64bit files (XPS_C8_DRIVERS.dll, XPS_C8_DRIVERS.lib and XPS_C8_DRIVERS.h), when trying to use loadlibr...

8 years ago | 2 answers | 0

### 2

answersQuestion

How to vectorize this loop? Subsequental subtraction of columns within a matrix

I'm trying to vectorize the following loop: a=rand(1000,100); j=1; k=2; tic for i=1:50; b(:,i)=a...

8 years ago | 1 answer | 0

### 1

answerQuestion

Using matlab and java to control a mouse on another computer

Hi, I know it's possible to control the mouse on a computer running matlab via a java robot (http://www.mathworks.com/matlabc...

9 years ago | 0 answers | 0

### 0

answersQuestion

Using fprintf and instrument control toolbox with serial connection

Hi, I'm trying to send commands to a monochromator (CM110/112) connected to a cpu (RS232). I've successfully connected to the...

9 years ago | 1 answer | 0

### 1

answerQuestion

Convolution on a nonlinearly spaced data set.

Hi, I am currently trying to use conv on a data set that is nonlinearly spaced. The convolution works, the issue I'm having i...

9 years ago | 1 answer | 0

### 1

answerBasic questions on conv function

Hi all, For those who run into this problem, I found that after you perform the full conv, you need to shift the time axis by...

9 years ago | 0

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Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

9 years ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

9 years ago

Question

Basic questions on conv function

Hi, Suppose I have the following code: t=(-1:.1:5); %Time axis for i=1:1:length(t); if t(i)<0 ...

9 years ago | 4 answers | 0

### 4

answersQuestion

Calculating a convolution using conv vs. a loop

Hi, I'm currently calculating the convolution of a Gaussian and a power law using the following code snippet: for j=1:...

9 years ago | 0 answers | 1

### 0

answersQuestion

Splitting an axis into a linear and log scale

Hi, I'm interested in splitting the x-axis of a plot into a linear section and a log section. For example, I want to plot -1 ...

9 years ago | 2 answers | 0

### 2

answersQuestion

Using nlparci and getting the error Cannot compute confidence intervals for complex values

Hi, I'm trying to get the confidence intervals using the following code: options=optimset('display','iter', 'MaxIter', 5...

9 years ago | 0 answers | 0

### 0

answersQuestion

Finding the largest index in an array that is divisible by a certain number

Hi, Given an nx1 array, I'm trying to get matlab to determine the largest index value which is divisible by a number (say 3),...

9 years ago | 1 answer | 0

### 1

answerQuestion

Breaking down a large array

Hi, I have a large array (nx1) of values that I'd like to break up into a new array. This new array takes the first 200 or so...

9 years ago | 1 answer | 0