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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 ...

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

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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 ...

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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.

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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...

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How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

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image toolbox help
type doc images in the command window.

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plotting more data from large data
Hi doc gscatter hope this helps. Regards, W.

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What does +(A>0) do?
I often do this to convert a logical matrix to double. However, I just tried and realized that this is slower than A = double(A>...

14년 초과 전 | 1

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error using imsubtract
Hi Megah, apparently both variables don't have the same class. Try image3 = imsubtract(im2double(image1),im2double(BWfinal)...

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Calculate the indirect distance between two points
Bahare, you might find this contribution interesting: <http://www.mathworks.com/matlabcentral/fileexchange/8625-shortest-pat...

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Ordered connected components
Hi Dustin, I don't have MATLAB at hand right now, so I cannot try, but I think bwboundaries should solve your problem. [...

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Graph analysis question
I just tried your example. While results of a kmeans clustering don't look too promising, the function clusterdata works quite w...

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Overlay digital elevation model on hillshade
Hi Ajay, you might want to check TopoToolbox, which includes such a function. <http://physiogeo.unibas.ch/topotoolbox/> ...

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Count black and white pixels on a image
How about using *blockproc* to get the number of white pixels (in case you have the image processing toolbox)? A = full(spran...

14년 초과 전 | 1

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Keeping k largest values in each column of a sparse matrix
Hi everyone, I am trying to implement an algorithm that involves a pruning of a large sparse matrix. The pruning scheme shoul...

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data correction
Hi, you can identify the NaNs using the function isnan. I = isnan(dem); % where dem is the digital elevation model The inpa...

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Problem on fuzzy inference calculations ..
Hi, the error message says all: The first input must be a defined DOUBLE matrix Is the variable input in double format? ...

14년 초과 전 | 1

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finding neighbor of a position
Hi, you might find this function useful. <http://www.mathworks.com/matlabcentral/fileexchange/16991-neighbor-indexing> ...

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Connect bwlabeled components
I'd start with using the function bwlabeln to label the connected components in the 3d. This, however, requires them to never ov...

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straighten curved Image
This is not trivial and I think you should show what you have done so far. If you haven't really started yet, you may want to lo...

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correlation coefficient
Hi, doc corrcoef Best regards, W.

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how to draw a grid in MATLAB???
Hi, take a look at Steve's blog, where he describes how to generate a pixel grid. Perhaps, this is what you want. <http://...

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Kriging
To my knowlegde there is no comprehensive geostatistical software written in Matlab. I would always use packages such gstat or g...

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How to plot a 2D vector-field and exclude zero-vectors (dots) in the graph?
How about: I = ~(T(:,3)==0 & T(:,4)==0); quiver(T(I,1),T(I,2),T(I,3),T(I,4)); cheers, Wolfgang

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Is there a way to prevent or circumvent the formation of long edges in a Deluanay Triangulation?
Hi AJP, without knowing what exactly yoou want to do, I like to link to a tool that was extremely helful to me. <http://w...

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TSP using GA
If this is so urgent for you, did you anything to find available code? Apparently not. Searching google with "tsp matlab ga" dir...

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Edge direction
Hi, to extract edges of any direction, you just need to choose the right structuring element for a morphological opening. E....

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How to make a 2-d binary shape a little more round?
You could also use a median filter to remove small objects and irregular boundaries. In a BW image, the median image would act l...

14년 초과 전 | 0

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Locating the end points of a bridge-like structure in an image
Hi G, you might identify these two points by calculating a skeletonization of your BW-image. SK = bwmorph(BW,'skel',inf...

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