# Gavin Seddon

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**Content Feed**

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...

plus de 2 ans ago | 0 answers | 0

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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 : ...

plus de 2 ans 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...

plus de 2 ans 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...

plus de 2 ans 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...

plus de 2 ans 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...

environ 3 ans 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...

environ 3 ans ago | 0 answers | 0

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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...

plus de 3 ans ago | 0 answers | 0

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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...

plus de 3 ans 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...

environ 4 ans ago | 0 answers | 0

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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...

environ 4 ans 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*...

plus de 4 ans 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 ...

presque 5 ans 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...

presque 5 ans 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...

environ 5 ans 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?...

environ 5 ans 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...

environ 5 ans ago | 1 answer | 0

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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....

plus de 5 ans 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...

plus de 5 ans 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...

plus de 5 ans ago | 1 answer | 0

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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...

presque 6 ans 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...

presque 6 ans ago | 1 answer | 0

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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.

environ 6 ans ago | 1 answer | 0

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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...

environ 6 ans ago | 0 answers | 0

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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. ...

environ 6 ans ago | 0 answers | 0

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answersgenerating graph from curve fit plot

This can be found: http://uk.mathworks.com/help/curvefit/plot.html

environ 6 ans 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...

environ 6 ans ago | 1 answer | 0

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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...

plus de 6 ans 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...

plus de 6 ans ago | 0 answers | 0

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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...

plus de 6 ans ago | 1 answer | 0