# Alexandra McClernon Ownbey

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**Content Feed**

Question

count number of rows in csv outside of matlab

I have 10000+ csv files I would like to import into matlab. I only need the data from the first and last rows for inlet and exi...

meer dan een jaar ago | 3 answers | 1

### 3

answersQuestion

Map triplets to a matrix

I have multiple structured meshes of a 2-D mesh that I merged together in pointwise (technically making it unstructured). The da...

ongeveer 2 jaar ago | 1 answer | 0

### 1

answerPerform AND operations with multiple matrices

This may not be the most efficient way, but it works. I stored everything in a logical and then compared the k-dimension in that...

meer dan 2 jaar ago | 0

coonecting line closer to next xy coordinates based on distance

x = pointdbscan.x; y = pointdbscan.y; d = sqrt(x.^2+y.^2); dz = diff(d); xplot{1}(1) = x(1); yplot{1}(1) = y(1); j =...

meer dan 2 jaar ago | 0

Question

interrupt a function when it takes too long

Is there a way to interrupt a function that has been taking too long in a for loop and continue to the next iteration? I am call...

meer dan 2 jaar ago | 2 answers | 0

### 2

answersQuestion

Plot a curve with its derivatives

I have data with the following information and coordinates (not the actual numbers, just an example): X Y dY/...

meer dan 2 jaar ago | 1 answer | 0

### 1

answerHow do I create a projectile motion code with inputs that outputs a graph?

Jake, are you entering your angle in degrees or radians? If you want to use degrees, use cosd and sind. You also don't need to ...

meer dan 2 jaar ago | 0

Solved

Return the first and last character of a string

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

bijna 3 jaar ago

Solved

Most nonzero elements in row

Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

bijna 3 jaar ago

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 ...

bijna 3 jaar 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...

bijna 3 jaar ago

Question

Find delta 99 of the boundary layer

I am trying to find the location of delta 99 (99 percent of the max velocity) in my velocity profile in a nozzle. I have the cor...

bijna 3 jaar ago | 1 answer | 0

### 1

answerSolved

Squares in Squares - Concentric Squares

Given a number, n, create an n x n sized matrix with concentric squares of 1s from the outside in. There should be a gap between...

bijna 3 jaar ago

Speed up resizing of app designer gui

For a gui, I always manually define the size a location of all my objects. I find it best to use normalized units. If I have sev...

bijna 3 jaar ago | 0

Plotting 3 function using mesh command

The best way to plot using mesh is to create three 2-D matrices with the same sizes. x = 0:.1:1; y = 0:.5:10; [xq,yq] = me...

bijna 3 jaar ago | 1

How to plot multiple plots using the same colour in a figure

You get the color that is used on the first plot and then use the same color for other plots. % random x and y values x = rand...

bijna 3 jaar ago | 1

Question

How can I refine a portion of my mesh?

I have a 2-D grid that needs to be very fine to capture the physics. The problem with using meshgrid or ndgrid is that it plots ...

bijna 3 jaar ago | 1 answer | 0