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Help with Numerical Differentiation
The error is because you have increased the number of elements in the time array x too high for the number of elements in the re...

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Huge plots number visualization/comparison
You can't compare 20-30 algorithms visually without it being incredibly dense and difficult to understand. You could try: 1) Ma...

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my for loop doesn't seem to be working. I want to add the correct letter to a string based on the equality of two arrays. How can I make this wok?
It seems the problem is that al is a string and therefore counts as one object for MATLAB. You can remedy this by switching to a...

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How to blank a grid value with a boundary file?
Use the inpolygon function to determine which points are inside the boundary you define, then replace those points which are out...

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Error using plot: vectors must be the same lengths
The problem is that x and y1 (and y2) are different sizes. Look at the linspace documentation - A = linspace(start,end); retu...

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How to estimate state space model and designate matrix C=1 or [1, 0]?
You are able to tell ssest which canonical form you expect the output to be in using the 'Form' option. Ex: ssest(data,order,'...

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Graph the solution of 3 different variables vs # iterations given 3 initial condition guesses on three separate graph obtained from an iterative solving while loop.
One possibility for why your charts only appear when you use point markers is what you are using for your plot data. You set i a...

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Create a surface between two sets of 3d data points
When you send matrices to the plotting command, the way that it plots depends on the orientation of those matrices % x, y, z al...

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Reorder cell array based on unique string value
If you want to find which of the rows of your string array contain specific values, you can use this: % This can also be genera...

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Defining different bounds to each variable in fmincon
The documentation for fmincon has the answer: you are allowed to pass upper and lower bounds as vectors. For example, lower_bo...

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Can someone please help me stop "Index exceeds array bounds." in iteration? Any help is highly appreciated.
You're asking for elements in x1 that don't exist. If we look only at the last loop n == 8 and you are asking for x1(7), but x1 ...

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ASCII Birthday Cake
Given an age and a name, give draw an ASCII birthday cake. For example, given the name "CODY" and the age 5, return a string wit...

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Missing five
Convert decimal numbers to a base-9 notation missing the digit *5* <<http://www.alfnie.com/software/missing5.jpg>> Too man...

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Polarisation
You have n polarising filters stacked one on top of another, and you know each axis angle. How much light gets passed through th...

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Octoberfest festival
A group of students decided to visit Octoberfest festival. First they ordered one beer, then after half-hour they taken one more...

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Circle/Pentagon Overlap
Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

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Inscribed Pentagon?
Your function will be provided with the five vertices of a pentagon (p) as well as the center point (cp) and radius (r) of a cir...

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Is this is a Tic Tac Toe X Win?
For the game of <https://en.wikipedia.org/wiki/Tic-tac-toe Tic Tac Toe> we will be storing the state of the game in a matrix M. ...

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Pentagonal Numbers
Your function will receive a lower and upper bound. It should return all pentagonal numbers within that inclusive range in ascen...

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I Plead the Fifth
Write a function to provide a yes or no answer to the input string. However, it must plead the 5th amendment (return an empty st...

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The Top 5 Primes
This problem series invites you to solve two simple problems related to the integer NUMBER FIVE, in order to celebrate <https://...

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Breaking Out of the Matrix
Do you want to take the Red Pill, or the Blue Pill? If you take the Blue Pill, you will simply pass along to the next problem...

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Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Submit your answer to this problem a multiple of 5 seconds after the hour. Your answer is irrelevant; the only thing that matte...

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Energy of a photon
*&#9883 &#9762 &#9883 &#9762 &#9883 &#9762 &#9883* Given the frequency F of a photon in giga hertz. Find energy E of this...

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Non-numeric x-axis labelling?
Use xticklabels to add labels to the x-axis of a plot. plot(<plot data>) x_label_locations = [0 1 2] x_labels = {'HT','HT+1',...

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Apply a function to a specific column of multiple matrices?
When you use element-wise multiplication with a matrix and a vector, MATLAB makes some assumptions to make the code simpler. For...

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how to plot double against datetime
In the attached CSV, the time data is the same for every 100 columns or so. Because of this, MATLAB is plotting all of the event...

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Calculating a matrix with a variable inside
The first issue you are having is because you are telling MATLAB to expect a 1x1 answer with A(i) and then providing a 2x2 matri...

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wrong matrix - provides 3x3 instead of 3x1
When you're multiplying matrices, you several times use element-wise multiplication instead of matrix multiplication. A = [1 2 ...

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Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

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