Question

solve, command reveals solution for each part of my polynomial
Hi I am using this <http://uk.mathworks.com/help/symbolic/solve.html> however the solution presented is for each part of th...

8 years ago | 3 answers | 0

3

answers

Answered
solve, command reveals solution for each part of my polynomial
Thank you both. Reading further I think vpasolve may condense these roots to a single value. Are you able to assist in using thi...

8 years ago | 0

Answered
Creating symbolic functionAnd variable
Thank you, I possess this toolbox but stupidly I hadn't started it, therefore the commands were not recognised.

8 years ago | 0

Question

Creating symbolic functionAnd variable
sims and symfun Are no longer recognised commands however I can create a variable with symvar. Is there a document page that out...

8 years ago | 2 answers | 0

2

answers

Question

Calculate X when derivative is zero
Hello, I want to calculate the first X instance when the function derivative is set equal to 0. I understand the solve toolbox ...

8 years ago | 0 answers | 0

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answers

Question

Constant error plotting function
when I use fplot I receive an error that the first constant that's already been used. I tried using @(varargin) command however ...

8 years ago | 1 answer | 0

1

answer

Question

plotting function function handle
hello, I have a function handle created from a previous function. How do I plop this between limits? Thanks.

8 years ago | 0 answers | 0

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Question

Constant already used When creating function handle
I am trying to create a handle for a Function, I received two errors: Error: Expression or statement is incomplete or i...

8 years ago | 1 answer | 0

1

answer

Question

Polynomial fitting generates erratic plot
Hello, I have a distance/time curve. The polynomial fit is erratic. A cubic function fits the data well however this does not s...

8 years ago | 0 answers | 0

0

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Question

Plot Y derivative and find resulting X value minimum
, I have X and Y data as time and distance. I would like to find the derivative the Y values and plot this. Therefore yielding ...

9 years ago | 1 answer | 0

1

answer

Question

Date incompatible Using curve fit
hello when I fit data for an oscillating curve I get an error that the data is incompatible and requires a Z value. Therefore...

9 years ago | 0 answers | 0

0

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Question

pdb file packing data Using homology toolbox
hello, is it possible using the homology toolbox to view and determine the amount of crystal packing within a pdb file? T...

9 years ago | 0 answers | 0

0

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Question

Maximum X value for maximum calculation obsurd
xHello using fminbnd to calculate a maximum, the resulting X value calculated is nought .9 whereas it should be about 3100. Ca...

9 years ago | 1 answer | 0

1

answer

Answered
undefined function or variable when definition set
Thanks, this briefly answers my long question Walter.

9 years ago | 0

| accepted

Question

undefined function or variable when definition set
hello my work space looks 'f, minusF, p1, p2, p3, p4, p5, p6, p7, p8, p9, RMSD, Sim' however when I issue the fminbnd c...

9 years ago | 3 answers | 0

3

answers

Answered
Using in-line function with fminbnd
Thanks Walter and Steven.

9 years ago | 0

Question

Using in-line function with fminbnd
hello I have created a separate handler (minusF) to deal with function maximum (fminbnd -f). However this needs an in line ...

9 years ago | 2 answers | 0

2

answers

Answered
Evaluating a function, variable not defined
Thanks.

9 years ago | 0

Question

Evaluating a function, variable not defined
hello, I am trying to evaluate a function but I receive an error. Will someone please help? My error is y = feval(minusF,x...

9 years ago | 2 answers | 0

2

answers

Answered
undefined X variable in curve fit
I had tried the 1st, I think it is my installation. Thanks.

9 years ago | 0

Question

undefined X variable in curve fit
hello, I have returned to the optimisation, I get f(x) = p1*x^7 + p2*x^6 + p3*x^5 + p4*x^4 + p5*x^3 + p6*x^2 + p7*x + p8...

9 years ago | 2 answers | 0

2

answers

Answered
Lowess smoothing for polynomial curve
Hello this page appears appropriate http://uk.mathworks.com/help/curvefit/lowess-smoothing.html however, I do not see the Low...

9 years ago | 0

Answered
using packages for defining constants
This was fixed using UNIX environment and M files.

9 years ago | 0

| accepted

Question

Lowess smoothing for polynomial curve
hello, I have a 7th degree polynomial curve, the X axis is time and the Y is a RMSD value. The error is 0.2. Is Lowess a good ...

9 years ago | 1 answer | 0

1

answer

Answered
Applying a negative to the function to find the maximum
Many thanks for all these answers; this was what I was after Titus. I will implement your suggestion Stephen. Thank you again.

9 years ago | 0

Question

Applying a negative to the function to find the maximum
hello to find the maximum point in a curve I must use the negative function however this creates errors. My function is f = @(...

9 years ago | 5 answers | 0

5

answers

Question

using packages for defining constants
hello, using packages to define constants appears a very efficient method for repetitive defining; I was using http://uk.math...

9 years ago | 1 answer | 0

1

answer

Answered
Exporting function from curve fitting toolbox
It appears that cut and paste is the simplest method. I asked this question since I am disabled and I thought there may be a fa...

9 years ago | 0

| accepted

Question

Calculating optimum using fminbnd
I am trying to use fminbndto calculate an optimum value. I want to define the function and use this with fminbnd. However I get ...

9 years ago | 1 answer | 0

1

answer

Question

Calculating optimum using fminbnd
I am trying to use fminbndto calculate an optimum value. I want to define the function and use this with fminbnd. However I get ...

9 years ago | 1 answer | 0

1

answer