BOB
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Accept 5 answers given by other contributors
Awarded to BOB on 22 Aug 2018
Feeds
Question
Assigning variables based on corresponding grid cells traversed by a line on a 2D grid plot
Hi, Assuming I have a 3x3 grid as follows, where the blue line is connecting two points (the red crosses): How would I code ...
4 years ago | 0 answers | 0
0
answersQuestion
Rearranging an equation containing the linsolve function
Hi folks, I have used the following equation to determine A: A = linsolve(CoefficientsMatrix,Residuals) For determining A, Co...
5 years ago | 1 answer | 0
1
answerQuestion
Solve 100 equations, each with a different amount of unknowns in matlab
Hi folks, I have 100 equations which I want to solve simultaneously. There are 9 unknowns (A, B, C, D, E, F, G, H, J). Not eac...
5 years ago | 1 answer | 0
1
answerQuestion
Why does this code output all values as 1?
Hi there, I'm trying to program a piecewise geometric function into matlab: I have written the code as follows. If anybody ca...
5 years ago | 2 answers | 0
2
answersQuestion
Principal Component Analysis Reconstructing Centred Data
Hi, I have the following dataset which I have performed PCA on: DATASET = 10.0000 6.0000 11.0000 4.0000 8....
5 years ago | 0 answers | 0
0
answersQuestion
Find flattest line from matrix of vectors plotted against x values
Hi there, I have a matrix of y-axis coordinates, which I'm plotting against a constant set of x-axis coordinates. I want to det...
5 years ago | 1 answer | 0
1
answerQuestion
'The 'Start' matrix must have the same number of columns as X.' - Error when using Kmeans
Hi, I want to carry out an iteration of k-means clustering. I am using the tutorial found at https://uk.mathworks.com/help/sta...
5 years ago | 2 answers | 0
2
answersQuestion
Can't loop k-clustering gap stat function
Hi folks, I want to loop the following function 20 times to determine the mode of the "OptimalK" output from the evalclusters...
5 years ago | 0 answers | 0
0
answersQuestion
Call first row from zero-padded matrix - only call the non-zero values
Hi folks, I have a zero-padded matrix. I'm aware A(:,1) would call the first row of matrix A, but I want to only call the val...
5 years ago | 1 answer | 0
1
answerQuestion
Remove empty rows from matrix
Hi folks, I have the following matrix: 0.6857 0.1248 0.9636 1.0884 0.4807 0.6077 0.3644 0 ...
5 years ago | 1 answer | 0
1
answerQuestion
Save variable from each run through of a loop into .mat file?
Hi folks, I have my looped function if true for Z = 1:length(ev_longitude) x1 = -4:10; ...
5 years ago | 1 answer | 0
1
answerQuestion
Save variable in workspace but remove from memory?
Hi folks, I've managed to loop my function to (correctly) determine the distance travelled by each line through the grid cell...
5 years ago | 1 answer | 0
1
answerQuestion
Convert cell array to two row vector
Hi folks, I have the following cell array: hvix = [2x1 double] [2x8 double] [2x15 double] [2x1 d...
5 years ago | 2 answers | 0
2
answersQuestion
Store sets of values as indices in a matrix?
Hi, I have a function which produces a set of horizontal and vertical graph axes intercepts. There are 120 sets of these int...
5 years ago | 1 answer | 0
1
answerQuestion
Reshape matrix whilst maintaining pairs ordering
Hi, I have a 2 x 120 matrix which I'm trying to reshape to a 120 x 2 matrix. To do this I'm using the following code: y =...
5 years ago | 1 answer | 0
1
answerLoop to carry out calculation for pairs 1 and 2, then pairs 2 and 3 and so on.
Cheers folks! Works great.
5 years ago | 0
Question
Loop to carry out calculation for pairs 1 and 2, then pairs 2 and 3 and so on.
Hi, I have two 8x1 matrices. One matrix is list of longitude coordinates (Final_Longitude_Values). The other matrix is the co...
5 years ago | 3 answers | 0
3
answersQuestion
Calculate how far a line travels through each square in a grid created using the meshm function
Hi, I have plotted a grid using the meshm function over a map with earthquakes and seismic stations plotted. Between each earthq...
5 years ago | 0 answers | 0
0
answersQuestion
Overlay a grid on a map
Hi, I have produced a map (using the worldmap function) with latitude limits of 55 to 65 and longitude limits of -5 to 10. I ...
6 years ago | 0 answers | 0
0
answersQuestion
Plot travel path of earthquake to a seismological station
Hi, I have 4 column vectors: Station latitude, station longitude, earthquake epicentre latitude and earthquake epicentre long...
6 years ago | 0 answers | 0
0
answersQuestion
Merge two columns of a cell array into one
Hi, I have two columns of cell values: <</matlabcentral/answers/uploaded_files/105933/Untitled.png>> I want to merge t...
6 years ago | 1 answer | 0
1
answerQuestion
Plotting text on the x-axis for residual analysis
Hi, I want to plot residuals against station name with station name on the x-axis. The x-axis values are in a 192x1 cell arra...
6 years ago | 1 answer | 0
1
answerQuestion
Determine averages for duplicate values
Hi, I have a cell array (11708 x 1) called "merged" where each value is the station name and the channel. I also have the re...
6 years ago | 1 answer | 0
1
answerQuestion
Find values outside of a range when calculating residuals.
Hi, I'm trying to find all my residuals above 3 and below minus 3 and extract the corresponding records to an excel sheet. I kno...
6 years ago | 1 answer | 0
1
answerQuestion
Plot categorical data as data labels on an x,y plot
Hi, I've plotted distance on the x-axis and acceleration on the y-axis. These values are from a string array. Within this...
6 years ago | 0 answers | 0
0
answersQuestion
Removal of spike at beginning of filtered signal time series plot
Hi, I have several plots of a filtered signal, all of which have a spike at the beginning which I would like to remove. Is th...
6 years ago | 1 answer | 0
1
answerQuestion
Sum all answers from structured array field
Hi, I'm trying to sum all values from one field of a structured array: (X(k(1:end)).NumberSamples) ans = 369...
6 years ago | 1 answer | 0
1
answer
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