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# Right Grievous

Last seen: bijna 2 jaar ago Active since 2013

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Question

How do I apply a fitgeotrans output or similar to points NOT an image?
Hi everybody, I have been using the _fitgeotrans_ function to find the best linear weighted mean transformation between two s...

meer dan 6 jaar ago | 1 answer | 1

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Question

3D reconstruction of points from three views - is there a 3 camera alternative to triangulate?
Hi everybody, I have three sets of x,y data, taken from an object tracked as it moves through three dimensions and taken by t...

meer dan 7 jaar ago | 1 answer | 2

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Question

How do I use Quiver with X, Y, radians and vector length?
Hi everybody, I would really like to use a quiver plot to display my data, however, I can't seem to get it to work properly, ...

meer dan 7 jaar ago | 1 answer | 0

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Question

Is it possible to use imrect and display an internal grid or lines which will drag with it?
Hi everybody, I am plotting a draggable rectangle using imrect, but I would like to show the user the internal grid of this r...

meer dan 7 jaar ago | 0 answers | 0

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Question

Is is possible to perform 3D triangulation on two sets of 2D data without knowing camera parameters?
Hi all, I am tracking the movement of an object inside a cube using two cameras - one above and one side-on. I need to re...

meer dan 7 jaar ago | 0 answers | 0

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Question

Detecting path/trajectory turns in tracking data
Hi all, I have some 2D cartesian position data (x,y,time) for a moving object, I would love the extract all of the points whe...

bijna 8 jaar ago | 2 answers | 0

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Question

Rotating polar coordinates 180 degrees
Hi all, I have a series of polar coordinates (ranging from -180 - 180 degrees), some of these coordinates are reflected in th...

ongeveer 8 jaar ago | 2 answers | 0

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Solved

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...

ongeveer 8 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 ...

ongeveer 8 jaar ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

ongeveer 8 jaar ago

Solved

Given a and b, return the sum a+b in c.

ongeveer 8 jaar ago

Solved

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 ...

ongeveer 8 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...

ongeveer 8 jaar ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

ongeveer 8 jaar ago

Question

Is it possible to morph a polygonal ROI into the shape of a second polygon?
Hi everybody, I was wondering (because it would be extremely helpful to a piece of code I am writing) whether it is possible ...

ongeveer 8 jaar ago | 2 answers | 0

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Question

Is it possible to calculate the line of sight between two points in a 2d polygon?
Hi everybody, I have a polygon defined by a number of vertex coordinates and I have a coordinate within this polygon. I would...

meer dan 8 jaar ago | 3 answers | 0

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Question

Morphing 2D cartesian coordinates, from one shape to another
Hi All, I have a slight problem for which I'm sure there must be a Matlab function but I can't work out what it is. I have a ...

meer dan 8 jaar ago | 0 answers | 0

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Question

Array indexing in parfor loops, why does this simple code not work?
Hi everybody, I have recently been looking into parfor loops, mostly out of curiosity. I have lots of loops which follow t...

meer dan 8 jaar ago | 1 answer | 0

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Question

Statistical comparison of two 2d matrices, corr2 or xcorr or other?
Hi everybody, I'm trying to compare 2d matrices (just 2 at a time) of identical sizes to see if they are similar, what I mean...

meer dan 8 jaar ago | 1 answer | 0

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Question

Is it possible to constrain an impoly within in impoly?
Hi everybody, I have a graph on which the user places a rectangle, I then want the user to be able to draw or modify another ...

meer dan 8 jaar ago | 1 answer | 0

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Question

ksdensity general help, what bandwidth and other settings to choose?
Hi everybody, I have some general questions regarding the ksdensity function. I'm trying to compare the cumulative density fu...

meer dan 8 jaar ago | 1 answer | 0

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Question

Rotate rectangle x number of degrees when using imrect or alternative function
Hi everybody, I would like to allow a user to draw a rectangle over a plot to highlight some data. This seems entirely possib...

bijna 9 jaar ago | 1 answer | 0

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Over commoditization frustrates me. Who at MTW decided nanmean and mean2 were so fantastic they should be distributed among two ...

ongeveer 9 jaar ago | 0

Question

Multcompare after ANOVAN - what does it mean?
Hi all, I'm running an ANOVAN (n-way anova) using the Matlab anovan function on my data and 4 grouping variables (the first o...

ongeveer 9 jaar ago | 0 answers | 0

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ANCOVA (aoctool) with 2 or more covariates
I'll answer my own question... again. aoctool can't take more than one covariate and there's no way round it. However, there ...

ongeveer 9 jaar ago | 1

| accepted

Question

ANCOVA (aoctool) with 2 or more covariates
Is there any way to run an ANCOVA in Matlab with more than one covariate? The aoctool function only seems able to accept an IV a...

ongeveer 9 jaar ago | 1 answer | 0

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Extract x,y coordinates from plot function OR find coordinates between two x,y points
I answered my own question again: In my case I had the option of changing the coordinates slightly - I wasn't trying to find ...

meer dan 9 jaar ago | 0

| accepted

Question

Extract x,y coordinates from plot function OR find coordinates between two x,y points
Hi again everybody, I have pairs of coordinates [x,y] which I can use to plot a nice figure of lines. However, I need to use ...

meer dan 9 jaar ago | 1 answer | 0

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Fitting a single amplitude sine wave to known peak/trough points
I solved this problem by taking each location of a peak, using linspace to create the numbers 90-180 (as many numbers as I had t...

meer dan 9 jaar ago | 1

| accepted

Question

Fitting a single amplitude sine wave to known peak/trough points
Hi again everyone, I have a vector of data which I want to fit a sine wave to, I want the amplitude of the wave to remain con...

meer dan 9 jaar ago | 1 answer | 0