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BOB


25 total contributions since 2017

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Question


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...

4 days ago | 1 answer | 0

1

answer

Question


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...

11 days ago | 2 answers | 0

2

answers

Question


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....

2 months ago | 0 answers | 0

0

answers

Question


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...

4 months ago | 1 answer | 0

1

answer

Question


'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 months ago | 0 answers | 0

0

answers

Question


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 months ago | 0 answers | 0

0

answers

Question


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...

8 months ago | 1 answer | 0

1

answer

Question


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 ...

9 months ago | 1 answer | 0

1

answer

Question


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; ...

9 months ago | 1 answer | 0

1

answer

Question


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...

9 months ago | 1 answer | 0

1

answer

Question


Convert cell array to two row vector
Hi folks, I have the following cell array: hvix = [2x1 double] [2x8 double] [2x15 double] [2x1 d...

9 months ago | 2 answers | 0

2

answers

Question


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...

9 months ago | 1 answer | 0

1

answer

Question


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 =...

10 months ago | 1 answer | 0

1

answer

Answered
Loop to carry out calculation for pairs 1 and 2, then pairs 2 and 3 and so on.
Cheers folks! Works great.

10 months 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...

10 months ago | 3 answers | 0

3

answers

Question


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...

10 months ago | 0 answers | 0

0

answers

Question


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 ...

12 months ago | 0 answers | 0

0

answers

Question


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...

12 months ago | 0 answers | 0

0

answers

Question


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...

1 year ago | 1 answer | 0

1

answer

Question


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...

1 year ago | 1 answer | 0

1

answer

Question


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...

1 year ago | 1 answer | 0

1

answer

Question


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...

1 year ago | 1 answer | 0

1

answer

Question


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...

1 year ago | 0 answers | 0

0

answers

Question


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...

1 year ago | 1 answer | 0

1

answer

Question


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...

1 year ago | 1 answer | 0

1

answer