# Rollin Baker

### MathWorks

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

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**Content Feed**

Solved

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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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

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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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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

| accepted

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

| accepted

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

| accepted

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

ROS Indigo Virtual Machine Download

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

| accepted

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

| accepted

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

Unable to connect arduino to MATLAB R2016b through the MATLAB Support Package for Arduino Hardware

Hi Giulia, Some users have reported that connecting to an Arduino can be very slow if your computer's Bluetooth is turned on....

nästan 6 år ago | 0

Can I implement a spatial derivative in a simscape custom component?

The beginning of your question is a bit unclear. You mention you want to take the derivative of H with respect to M, but you the...

nästan 6 år ago | 0