Answered
World coordinates XY scale
The imshow function automatically sets the DataAspectRatio to be [1 1 1], i.e. the same effect as axis equal. To undo this, set...

4 years ago | 1

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Answered
Counting how many times a number occured after a specific number
This is a good use case for accumarray: S = [ 3 2 2 4 3 1]; [seq, ~, g] = unique([S(1:end-1)' S(2:end)'], 'rows'); n = ...

4 years ago | 2

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Answered
How do I extract the HH:MM:SS.FFF portion of a julian day time stamp?
An alternative method that avoids regular expressions would be to let datetime to the parsing for you: Data_Time_Stamp_Cells = ...

4 years ago | 1

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Unstack - How to break a table into equal chunks of data?
I usually just use splitapply for this sort of thing. (And the kron trick is a nice one for generating repeating blocks of numb...

4 years ago | 1

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Plotting with four y-axes in the same figure, with multiple datasets against one of the y-axes
While there are a lot of FEX options out there, I really think it's easier to manually control things once you start playing aro...

4 years ago | 6

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Answered
How do I create a 2d surface plot for a function of x and y?
Change fxy = sin(x).*cos(y) to fxy = sin(xm).*cos(ym)

4 years ago | 1

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Plotting contourf with discrete x axis
The contour function always assumes your input data are points on a surface that can be linearly interpolated between. To get a...

4 years ago | 1

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what does the string #ok<NASGU> mean in the code editior
That code disables the Code Analyzer from suggesting changes to the syntax. Specifically, <NASGU> refers the the ID associated ...

5 years ago | 1

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How to combine all columns of an array into one column?
Are the values in A always going to be less than 10? If not, what answer do you want? I see two possibilities; treat each valu...

5 years ago | 0

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(mapping toolbox) Map axes xdata, ydata and zdata meaning?
Map axes apply a geographic transform to convert the geographic coordinates to the projection used by the map axis. You can per...

5 years ago | 2

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Answered
cut out section of x axis
Rather than shifting data and manually overriding tick labels, I prefer to use multiple axes to achieve breaks like this. The a...

5 years ago | 5

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Plotting X, Y cordintions with a line short line that indicates the angle
With quiver, the u and v arguments represent the horizontal and vertical components of the arrow you want to draw. You can calc...

5 years ago | 1

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How can I assign several values from cell-array tovariables?
I think you'll need to use a quick intermediate variable so you can convert the numeric array to a comma-separated list: tmp = ...

5 years ago | 1

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Answered
How to use animated line
A couple notes here... First, plotting a graph object creates a GraphPlot object, not a line, so it can't be used (out of the b...

5 years ago | 1

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Answered
Creating a graph with both descending and ascending x-axis and one y-axis
Does this do approximately what you want? ax(1) = axes('position', [0.1 0.1 0.4 0.8], 'box', 'off', 'yaxisloc', 'left', 'xdir',...

5 years ago | 1

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Answered
Colour range in a surfplot
By default, a surf plot uses faceted shading, which means that each face is a solid color, determined by a single vertex in that...

5 years ago | 5

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Answered
How to change the origin from (0,0) to different coordinates in a plot
You don't need to move the axis; you need to provide x-values for your data. Right now, you're using the ydata-only option for ...

5 years ago | 0

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I got "The expression to the left of the equals sign is not a valid target for an assignment."
As others have pointed out, i is already assigned the value you want by default. But assuming it weren't, the proper way to ass...

5 years ago | 0

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Create a Matrix with Specific Pattern for Changing Values
Create a grid of values, then unwrap: xval = [-3*pi/4 -3*pi/8 0]; [a,b,c] = ndgrid(x,x,x); x = [c(:) b(:) a(:)]

5 years ago | 0

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How do I insert multiple vectors as diagonals in the same matrix?
You're close... you just need to add the matrices together: A = diag(v,1) + diag(v,-1) + diag(v1,0)

5 years ago | 0

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Answered
How to concentrate matrices of different row length (same column length) into one matrix by unfolding each of the matrices to the smallest row length conatining numbers not nan
Do any of your matrices have non-trailing blank/all-NaN lines that you want to preserve? Or are you just trying to strip out th...

5 years ago | 2

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find the shortest path
Take a look at graph and digraph objects; the shortestpath function provides several different algorithms to calculate this for ...

5 years ago | 2

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how to use color sets in maps by defining intervals in matlab (for example: lower than 10 , between 10 and 50 , between 50 and 200, between 200 and 1000, greater than 1000). thanks
What are you trying to do with those color intervals? Create a colorbar? Or perhaps a contour plot? If the latter, you can tr...

5 years ago | 1

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Remove data elements of the legend from figure
Technically, you can delete parts of a legend, but I only know how to do it via code, not via to UI. I should mention that us...

5 years ago | 6

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How to plot four subfigures in one figure? Rather than subplot
I think the only slightly difficult part of this would be the modified x-ticks. When I create adjacent axes like this, I prefer...

5 years ago | 1

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Answered
Matrix dimension does not agree when using .*
When you calculate Y = diff(X,n) where X is a vector, Y will have length length(X)-n. So you need to adjust X accordingly wh...

5 years ago | 0

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Answered
How to display the data points on my graph?
Add a hold after your scatter plot: scatter(rand(10,1), rand(10,1)); hold on fplot(@(x) x, [0 1])

5 years ago | 0

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Answered
Plot a drawn, filled shape at each data point
A single multi-faceted patch will render more quickly than lots of individual rectangles. And this option allows your marker to...

5 years ago | 0

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Why am I getting the error "Array indices must be positive integers or logical values."?
My guess is you have a variable named eig sitting in your workspace. So when you try to call the eig function, the variable is ...

5 years ago | 13

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Answered
How do you format file names in a Mac?
You've got a few typos in your filename generator not related to file separators... for example, when i = 1, you build the file ...

5 years ago | 0

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