Gavin Seddon
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Accept 20 answers given by other contributors
Awarded to Gavin Seddon on 20 Jul 2017
Feeds
Question
MAC MATLAB crashing on start up
Hello when i start MATLAB on my MAC it crashes I then start from an x11 terminal and i get /Applications/MATLAB_R2020a.app/C...
4 years ago | 0 answers | 0
0
answersQuestion
plotting x and y differential
hello I have plotted x and y data and seen evidence of a bifurcation. I want to plot x vs diff y. this is what i did : ...
4 years ago | 1 answer | 0
1
answerQuestion
using command to operate cftool
Hello I am using large data sets and cftool continually buffers. I have increased my memory to 96gb and the buffering remains...
5 years ago | 1 answer | 0
1
answerQuestion
negative x axis meaning
Hello I have a vector plot created from multiple functions. The x axis values are incorrect and some are negative. Does matla...
5 years ago | 1 answer | 0
1
answerQuestion
will increased memory solve buffering issues
Hello I have tables with many floating point values and when I try to use cftool my MAC starts buffering. It is a quad core i...
5 years ago | 1 answer | 0
1
answerQuestion
viewing vectors from a table
Hello, My recent results have allowed me to generate a feather graph (found at: https://uk.mathworks.com/matlabcentral/answer...
5 years ago | 1 answer | 0
1
answerQuestion
incomplete graph from array
Hello, I have created an array of a table. a plot of the data shows a complete sine wave. When I plot the array using "con...
5 years ago | 0 answers | 0
0
answersQuestion
matlab function not recognised by excel
Hello, I have generated a matlab function and then taken the second derivitive. I want to place this function within an...
5 years ago | 0 answers | 0
0
answersQuestion
calculating x when y is > 0
Hello I have plotted a changing distance (d(x)) with time using cftool and calculated the function. Its derivative was calcula...
6 years ago | 1 answer | 0
1
answerQuestion
linking table column label with symbolic function
hello using an uploaded table is it possible to define the column labels as symbolic functions? Thereby enabling subsequent sy...
6 years ago | 0 answers | 0
0
answersQuestion
plotting derivative function against Y value
hello I have a distance/time graph and I want to plot the velocity against distance. I have created the velocity function v:eva...
6 years ago | 1 answer | 0
1
answerQuestion
Unsual gradient from gradient
Hello, when I try and calculate the gradient I receive slope = gradient (fx) slope = (7167*x^2)/25000 - (3523*...
7 years ago | 1 answer | 0
1
answerQuestion
Radian calculation from either differential or gradient
Hello, I have gradiant values (and their differentials). However, my motion is in a circle and mathematically the 2πrad may be ...
7 years ago | 1 answer | 0
1
answerQuestion
Using 0 1 chaos test
Hello, I have some noisy data which I would like to test for chaos. I have checked the web but cannot find the instructions for...
7 years ago | 1 answer | 0
1
answerQuestion
Substituting and evaluating function
I have attempted to substitute the X variable into my function and evaluate it. This is the result. If it is not possible please...
7 years ago | 1 answer | 0
1
answerQuestion
Gradient is zero yet exists
Hello gradient (140,150), the answer is 0, but it exIhere is my error please? Also, is *diff* for calculating the derivative?...
7 years ago | 1 answer | 0
1
answerQuestion
Import data to splinetool create spline with function
Hello, initially I created a spline with cftool. Is it possible to import the same data to splinetool and generate the function...
7 years ago | 1 answer | 0
1
answerQuestion
Creating phase plot from initial data
I have a data table with no associated function, is it possible to generate the vector field and phase diagram from this? GS....
7 years ago | 1 answer | 0
1
answerQuestion
Determining function for smoothing spline
Hello, my data when plotted resembles a plot of a sine function and consequently a polynomial curve will not converge. Therefor...
7 years ago | 1 answer | 0
1
answerQuestion
slope at defined co-ordinates
Hello I have defined my distance function as d = (5757*x^3)/100000 - (2227*x^2)/10000 + (1303*x)/2500 + 25/2 I then diffe...
8 years ago | 1 answer | 0
1
answerQuestion
Gradient command producing multiple functions
Hello, when I use the gradient command I am given multiple functions as the answer. I assume these are the gradient at each 'ro...
8 years ago | 2 answers | 0
2
answersQuestion
error when plotting function
hello, when i give this function i get the following error will someone please correct me ? >> fplot(@(a1*sin(b1*x+c1) + a2...
8 years ago | 1 answer | 0
1
answerQuestion
Multiplying spreadsheet column by variable
Hello can a spreadsheet column be multiplied by a variable of a function to generate a new column? g.
8 years ago | 1 answer | 0
1
answerQuestion
getting an import error
hello when I try to Import data I receive Error using uiimport (line 142) Java exception occurred: java.lang.NullPointer...
8 years ago | 0 answers | 0
0
answersQuestion
Error using plot command
hello, I am attempting to replot my data however I received this error Error using symengine The dimensions do not match. ...
8 years ago | 0 answers | 0
0
answersgenerating graph from curve fit plot
This can be found: http://uk.mathworks.com/help/curvefit/plot.html
8 years ago | 0
| accepted
Question
generating graph from curve fit plot
Hello, is it possible to use the fitted curve from cftool rather than use the function it has calculated to generate the grnap...
8 years ago | 1 answer | 0
1
answerQuestion
.fig won't open
I have created a.fig file which is set to 'visible' however when I try and open this either using File >Open or openfig it is n...
8 years ago | 2 answers | 0
2
answersQuestion
Function plot appears reversed
Hello, The plotted function Y value is e20 when it should be 13.6e1. So rather than a graph starting linear and going constant...
8 years ago | 0 answers | 0
0
answersQuestion
Function plot limits produces errors
fplot (@(x) was used to generate a figure the resulting curve shape is wrong and errors are produced. The correct X minimum a...
8 years ago | 1 answer | 0
1
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