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# Thomas Satterly

##### Last seen: 3 meses ago
30 total contributions since 2019

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Pre-allocating memory for a while loop
If you don't know how large your arrays need to be for preallocating the entire array, what you can do is allocate "chunks" of t...

6 meses ago | 0

Adding a Graph into a uipanel GUI
You need to create an axis object where the data will be plotted and pass this axis as the first argument to your plot function....

6 meses ago | 0

How to create 2D matrix from 3D without a loop?
Here's one way to do it with vectorized code. Calculating the column index list can probably be done better, but it gets the ide...

6 meses ago | 0

Plotting a meesh?
Without seeing your data, it's difficult to say exactly how you shoud go about representing your data. However, something like t...

6 meses ago | 0

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Is it possible to take a Screenshot of a website with Matlab?
Here's one way to do it using some java from withing Matlab. If you want to save the resulting image, see imwrite. % Open up a ...

6 meses ago | 1

Need help with heuns method (rk2) for second order DE
1) You forgot to index the variable "v" in a couple places 2) Matlab indicies start at 1, not 0. Corrected code: % Runge...

7 meses ago | 0

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Change Logo on Matlab Figure (not GUI)

7 meses ago | 0

How to Set Sine Wave Frequency
Make sure your time step is small enough to capture oscillations on the order of GHz. You might be generating the "correct" sign...

7 meses ago | 0

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Remove a number and its duplicates, not just the repeated values i.e. the way the unique function operates
This should lead you along the right track: % Ex: % A = [2;2;4;3;3;5;6]; % remove(A, 2) Removes all 2's % remove(A, 2, 3) R...

7 meses ago | 0

how to select two arrays from a group of four
To find the sum square of an array: sumSquared = sum(array.^2); If you have your arrays all together in a matrix: % If eac...

7 meses ago | 0

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Solved

Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

7 meses ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

7 meses ago

Solved

Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

7 meses ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

7 meses 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 ...

7 meses ago

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...

7 meses ago

Solved

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:...

7 meses ago

adding for loop to prevent changing char to same char
This is an interesting problem and a fun challenge. You don't need a for loop, rather, you can only allow different letters to b...

7 meses ago | 0

find(vector==value) not working
While it looks like the 17th value of your vector is 0.16, it's actually slightly off because of floating point precision. What ...

7 meses ago | 1

Creating Variables with GUI inputs
There are a number of ways to store data in a GUI so that it's accessible to different functions. Matlab's suggested way of pass...

7 meses ago | 0

Data acquisition and Visualisation of LIDAR sensor in REAL TIME
Matlab isn't very good at graphics with high update rates, but it is doable. I'd suggest looking at the line and scatter objects...

7 meses ago | 1

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Custom class property and method attributes
So Matlab doesn't support this type of thing, which can't really be too surprising. The best way I've found to get around this i...

7 meses ago | 0

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Plotting 3d orientation and position data (3d lines)
Check out quiver3 - it basically plots a vector field for the supplied points. For your case, you'll want X, Y, and Z to be the ...

7 meses ago | 1

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Two y-axis colors
Assuming you did something similar to the code below, you can access the axis properties directly and change the color to whatev...

7 meses ago | 0

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New to matlab, help?
Since this is an assignment, I'm not going to just give you the code, but there are a few pages you should look at to get you on...

7 meses ago | 0

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User surface on piano
Matlab has button click callbacks for graphical types. There's always multiple ways to approach a problem, but this is the route...

7 meses ago | 2

How to plot arrays of different sizes using interp1?
I would suggest using cross-correlation to find out where these two signals match up the best. The data you posted needs a littl...

7 meses ago | 0

Get variables from my Matlab workspace
You should be using either inports or parameters to pass data from Matlab to you Simulink block. The "From Workspace" block work...

7 meses ago | 0

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3D plot help
If you're expecting the independant variables X, Y, and Z to make some nice looking 3D surface, you can use Delaunay Triangulati...

9 meses ago | 0

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Question

Custom class property and method attributes
I'd like to be able to define my own attributes in classes, but I'm not finding any documentation as to how that might be done. ...

9 meses ago | 1 answer | 2