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

11 years 前 | 1

| 已接受

已回答
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...

11 years 前 | 0

| 已接受

已回答
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 ...

11 years 前 | 1

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

12 years 前 | 0

已回答
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,...

12 years 前 | 0

已回答
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...

12 years 前 | 1

| 已接受

已回答
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 ./ ...

12 years 前 | 0

已回答
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(...

12 years 前 | 0

已回答
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 ...

12 years 前 | 0

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

12 years 前 | 0

已回答
Vandermonde Matrix and an Error Vector
X = V\B

12 years 前 | 0

已回答
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...

12 years 前 | 0

已回答
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)

12 years 前 | 0

已回答
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 ...

12 years 前 | 0

| 已接受

已回答
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...

12 years 前 | 0

| 已接受

已回答
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...

12 years 前 | 0

| 已接受

已回答
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)) ...

12 years 前 | 0

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

12 years 前 | 0

已回答
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...

12 years 前 | 0

| 已接受

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

12 years 前 | 1

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

12 years 前 | 0

已回答
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 ...

12 years 前 | 0

| 已接受

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

12 years 前 | 1

| 已接受

已回答
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...

12 years 前 | 0

已回答
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 ...

12 years 前 | 1

已回答
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...

12 years 前 | 1

已回答
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...

12 years 前 | 0

| 已接受

已回答
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)

12 years 前 | 0

已回答
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?

12 years 前 | 0

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

12 years 前 | 0

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