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Attivo dal 2011

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Risposto
linear system of equations
Your equations are not independent. The second is 2 times the first

oltre 10 anni fa | 1

| accettato

Risposto
Troubles with interaction problem
here is a partial answer, without using symbolic tool box...see my comment above and you should be able to adapt the code to wha...

quasi 11 anni fa | 0

| accettato

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Why is my Simpson's 3/8 code not producing the correct values?
your first loop should start at 2, second at 3, third at 4. Set end points for all loops at n-1. Make sure n is divisible by 3 ...

circa 11 anni fa | 1

Risposto
how to create customized curve ( only know the shape )
maybe this or similar would help <http://www.mathworks.com/matlabcentral/fileexchange/7173-grabit>

oltre 11 anni fa | 0

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problem about ODE (Rayleigh-Plesset Equation) error in ode15s
check your call to ode15s [T,R] = ode15s('RP',[0 3e-8],[1e-6 70]); %your code what does the following give you? [T,...

oltre 11 anni fa | 0

Risposto
Problem in reading data from Excel sheet and copying it in 2d array
reverse i & j ? %copying data from the Numeric array to P for i = 1: 1:1110 for j = 1: 1 : 6...

oltre 11 anni fa | 1

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Risposto
Issue with lsqcurvefit and langmuir type equation
see comments in revised code below myfun = @(x,xdata) (x(1)*x(2).*xdata)./(1+x(2).*xdata); %added elementwise operators ./ ...

oltre 11 anni fa | 0

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how do i save looped output into 1 variable matrix
c=19; % D=[]; p = zeros(c,1); % preallocate for k=1:c; Z=[X(:,1),Y(:,1)]; p(k)=anova1(Z); %D=save(p) unecessary %X(...

oltre 11 anni fa | 0

Risposto
Plese help me. Matlab 'while' loop. A set of data is given..?
x =[ 8, 10, 12, 14, 16] find(x>=11,1) ans = 3 *edit*----------------------------- x = 8 10 ...

oltre 11 anni fa | 0

Risposto
Finding coefficients and constant for multivariable linear equation.
You don't have enough points. 4 points < 5 unknowns

oltre 11 anni fa | 0

Risposto
Vandermonde Matrix and an Error Vector
X = V\B

oltre 11 anni fa | 0

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gaussian histogram so that area is equal to one.
it does not make sense to me to have the number of bins equal to your length of data. The purpose of a histogram is to describe...

oltre 11 anni fa | 0

Risposto
Is this code ok?It asked to plot function together with hold on...syms x y; t=-2:0.1:2 n=-2:0.1:2 x=2*sin(4*pi*t); y=2*sin(4*pi*n); plot(t,x,'r',n,y,'g'); hold on; title('function'); legend('x function', 'y function'); grid on;
* no need for syms x y * x & y are the same thing perhaps you meant y = 2*cos(4*pi*t)

oltre 11 anni fa | 0

Risposto
error message using polyfit (nonlinear regression)
I think it is obvious from the message; you don't have a enough data points to fit the polynomial uniquely. Like fitting a line ...

oltre 11 anni fa | 0

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Error using mupadmex " MuPAD "
Don't define wn as symbolic vo=input('vo='); xo=input('xo='); wn=input('wn='); syms t; %syms wn; comment this...

oltre 11 anni fa | 0

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Risposto
Plot inside a "for" loop
Please see comments in code. I checked a couple of values and they agree with your excel table, but it is up to you to verify t...

oltre 11 anni fa | 0

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Risposto
finding the breakeven point
Are you sure your equation is right? Anyway here is an example with a modified equation: f = @(c) log((c-1)./log(1+c)) ...

oltre 11 anni fa | 0

Risposto
sum(w) and ones(1,size(w,2))*w' results totally different numbers
try ones(size(w))*w.'

oltre 11 anni fa | 0

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Ttest problem with alpha
you do not need to pass 'Alpha' to the function, you are getting the error because you are trying to pass a string when it is ex...

oltre 11 anni fa | 0

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Cleaning-up Code With Comments
%{ were you thinking of multiple lines of comments? (curly braces,not tildes) }%

oltre 11 anni fa | 1

Risposto
Curve fitting to get gamma curve parameter
If you have the statistics toolbox, you can use: gamfit()

oltre 11 anni fa | 0

Risposto
to find area of parabola?
x=[7.8 8.25 8.55]; y=[0.96 0.99 0.94]; p=polyfit(x,y,2); %f=polyval(x,p); x & p should be reversed ...

oltre 11 anni fa | 0

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Risposto
Plot empties after using datetick
clc;clear; close all startDate = datenum('01-01-2009'); endDate = datenum('12-31-2009'); xData = linspace(startDa...

oltre 11 anni fa | 1

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Risposto
How to plot in 4_D?
look at the documentation for slice by typing in the command window doc slice also, look at the documentation f...

oltre 11 anni fa | 0

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Simpson's Rule Illustration - How to create those parabolas?
here is what I have done <<http://snag.gy/cjsli.jpg>> clc;clear; close all x = linspace(0,4*pi); % create data ...

oltre 11 anni fa | 1

Risposto
How to solve max load of P in Matlab?
So, when I see a problem statement that says "solve the above system of equations" I think of formulating the equations in matri...

oltre 11 anni fa | 1

Risposto
Want to make linear fitting and plot both graph on the same curve
you are going to have to transform your data: x=[0;0.100000000000000;0.200000000000000;0.300000000000000;0.40000000000000...

oltre 11 anni fa | 0

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Risposto
Solving for a data point
pt2pt1 = @(M)(((y+1)*M^2)/((y-1)*M^2+2))^(y/(y-1))*((y+1)/(2*y*M^2-(y-1)))^(1/(y-1))-.6925 fsolve(pt2pt1,2)

oltre 11 anni fa | 0

Risposto
Creating a for loop that adds a number to a letter
for insight into what is going on try char(1:99) does it look familiar to what you are getting?

oltre 11 anni fa | 0

Risposto
How to obtain values symbolically
alternative: c =sym(1:10) f = @(x) sum(c.*x.^(1:length(c)));

quasi 12 anni fa | 0

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