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# Rollin Baker

### MathWorks

Active since 2017

I'm an engineer at MathWorks with an education in computer science and hardware design.

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

nästan 5 år 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...

nästan 5 år ago

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Is my wife right?
Regardless of input, output the string 'yes'.

nästan 5 år 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...

nästan 5 år ago

Solved

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

nästan 5 år ago

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

nästan 5 år ago

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Given a and b, return the sum a+b in c.

nästan 5 år 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 ...

nästan 5 år 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...

nästan 5 år ago

Can't install any toolboxes because can't write to /usr/local/MATLAB/R2017
Hi Paul, For any installation issues, you will want to contact MathWorks Technical Support. They will likely be able to help ...

nästan 6 år ago | 1

Why is there an error when I call my function?
You are seeing this error because you are trying to access 'z(2)', but 'z' only contains one element. It seems that you are expe...

nästan 6 år ago | 0

after scatter3(), how to draw a contour line in the same figure？
Hi Hong, As KSSV said, you just need to call 'hold on;' to plot both graphs on the same figure. I don't know exactly what you...

nästan 6 år ago | 0

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Changing solution when using sparsity pattern with ode15s
Hi Carsten, I'm not totally sure if I understand your workflow, but I found a documentation page that details how MATLAB solv...

nästan 6 år ago | 0

How to display different graphs depending on the position of the mouse pointer on an image?
Hi Guillaume, If your image is on a figure, then you could use the 'WindowButtonMotionFcn' callback to invoke a custom funct...

nästan 6 år ago | 0

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Im having problems with the reconstruction through two-channel filter bank when I use my audio files.
Hi Christian, The reason you are seeing zeros for your final result is because you are overwriting all previous values for 'h...

nästan 6 år ago | 0

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Extraction of a touchstone file from rlcg data for the multi-port file
Hi YoungGon, Have you looked at the 'rfwrite' function yet? It can handle multiple ports and seems like a good fit for what y...

nästan 6 år ago | 0

Hi Anastasios, The link worked for me, and seems to work for other users, so the issue must be somehow specific to your envir...

nästan 6 år ago | 0

Here is my code so far, how would I code a checkWin function that will determine the winner of the tic tac toe game?
Hi Sterling, You didn't specify exactly how you were modeling your tic-tac-toe board, but I'm going to assume you are storing...

nästan 6 år ago | 1

setting parameters for 4 Blocks (wrong number of input arguments, should be odd?)
Hi Bünyamin, The reason you are seeing this error is because the 'set_param' function is only meant to be called on a single ...

nästan 6 år ago | 1

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What is the difference in capability for DSP and Signal Analysis?
Hi Andrew, There are two toolboxes that jump out to me that seem like a good fit for your project. 1) <https://www.mathwo...

nästan 6 år ago | 0

i want a code for hsv space quantization in which hue(0,360) divided in 8 channel, and S [0,1]and v [0,1]divided in to 3 shares. and also if possible code for dominnant color descriptor.
Hi Harsh, Assuming you have the RGB values for the image you want to convert, you can simply use the rgb2hsv function. The do...

nästan 6 år ago | 0

How do I write individual 'labels' for each slice (e.g. ImageJ) of a multi-page TIF in Matlab?
Hi Dhrubajyoti, Looking through the MATLAB documentation, I was able to find a "PageName" tag for TIFF objects. You can use t...

nästan 6 år ago | 0

If i have 10 random (x,y) coordinates in form of Z given below gives the location of nodes.How to give number labelling to these coordinates?And how to construct a (node and link i.e G(v,e) )graph with weights equal to the distance between the nodes?
Hi Sneha, You can create your graph using the "digraph" function, and determine the weights using the "pdist" function. This ...

nästan 6 år ago | 0

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Any MATLAB functions for prediction index and Brier score
Hi Eric, MATLAB has quite a few options for your use case, particularly within the Statistics and Machine Learning Toolbox....

nästan 6 år ago | 0