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Peter O


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Automotive Industry

181 total contributions since 2011

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Answered
Messagebox warning in matlab
The NCC return value you're getting back is a matrix of correlation values (for Lena, it's 512x512). The string you're passing t...

alrededor de 17 horas ago | 0

Answered
Printing outputs when running C code in simulink via the coder.ceval function
Not completely sure about this one, but if there is there a way to access the Simulink diagnostics panel from within the C code,...

1 día ago | 0

Answered
save animation ,i need help
Sofiane, Take a look at the VideoWriter and getFrame functions: https://www.mathworks.com/help/matlab/ref/videowriter.html Sp...

1 día ago | 0

Answered
I got this error while running a simulink model
You generally get this error when your simulation has an error that causes one of the states to grow exponentially until one of ...

2 días ago | 0

Answered
Loading and saving variables when using parallel toolbox
File access with parallel workers can be tricky, and in the past I've been successful by creating a separate temp directory per ...

24 días ago | 1

| accepted

Answered
How do I highlight very faint lines from an image?
Have you tried the Hough transform? https://www.mathworks.com/help/images/ref/houghlines.html

24 días ago | 0

Answered
Plot variables with similar names.
Are they already saved variables? If not, can you assign using a cell format instead? The mapping would look something like: v...

24 días ago | 0

Answered
Associate Map container with specific values
Map containers are a type of hash object, but not all MATLAB datatypes are hashable. The keys of containers are limited to a sub...

24 días ago | 0

Answered
How can I plot in dB in Matlab?
Decibels are a ratiometric measurement. For power, as shown in your plot, the reference is 1 milliwatt (denoted from the dBm). 0...

24 días ago | 0

Answered
Does this variable exist
For structures, use isfield() clear a a.M = 'hat'; isfield(a,'M') % True isfield(a,'N') % False For array size, use length(...

25 días ago | 0

Answered
Making the if statement in a for loop display only one iteration of the message
Looks like it takes 25 iterations to converge. Are you looking for it to display at the very end a Success/Failure message? The...

26 días ago | 0

Answered
NEED HELP SOLVING "Array indices must be positive integers or logical values"
Does it need to be a one-liner? If you can grab the x,y coordinate, you could clamp your index points to the box bounds using %...

26 días ago | 0

Answered
Change Simulink parameters in Matlab function
Simulink will look for variables in MATLAB's base workspace by default. Since var1 and var2 are defined in the function's worksp...

27 días ago | 0

Answered
Error with an empty array - Subscript indices must either be real positive integers or logicals
You're subscripting a logical IXY, which will only retrieve indices that evaluate to true from HEIGHTS. Is it possible that all ...

27 días ago | 0

Answered
Grabbing Years of table data to Create New Tables
A fast solution might be to use the Timestamp to extract the date for each row and then use the group capabilities of tables. ...

27 días ago | 0

Answered
I need help with step function
Hi Anna, The (unit) step function is basically a function that goes from 0 to 1, generally at time 0, scaled by whatever magnit...

3 meses ago | 0

Answered
Problems With Function Error
Up until recently, MATLAB had a requirement to separate scripts from functions. A file could hold one but not both types. Now, i...

4 meses ago | 0

Answered
Assigning or replacing elements of another array into an array based on indices
Ali, I suggest you use logical indexing for this instead of FIND. It's faster and a little cleaner. Hope this helps! b = [0 ...

4 meses ago | 0

Answered
Error using figure First argument must be a figure object or a positive Integer
Figure is a function. Try: figure(4) This should activate a figure with ID number 4.

4 meses ago | 0

Answered
Run Simulink Model as a Function
Hi Sze, To clarify, you're hoping to run a simulink model from within a call to ODE45? While possible, I'm afraid this is goi...

4 meses ago | 0

| accepted

Answered
find max value of structure
If I'm understanding correctly, you have a struct array, s, of size 1x30, with a single field (let's call it x). Something like...

5 meses ago | 0

Solved


Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

5 meses ago

Solved


Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

5 meses ago

Solved


Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

5 meses ago

Solved


Create a vector
Create a vector from 0 to n by intervals of 2.

5 meses ago

Solved


Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

5 meses ago

Solved


Find max
Find the maximum value of a given vector or matrix.

5 meses ago

Solved


Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

5 meses ago

Answered
Derivative from ode45
Generally I send the result of ode45 back through my function as a post-processing step. [t,x] = ode45(@myDerivFcn,tspan,x0) ...

5 meses ago | 0

Answered
How to solve two differential equations simultaneously with one having a matrix form of initial condition?
Hi Adham, Just to be clear, it's an ordinary differential equation, is /? If so, and each matrix term is separable, then you ...

5 meses ago | 0

| accepted

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