My problem is to find the right equation to get the best plot to the data shown below, please commen on it

> restart;

> with(CurveFitting):with(plots);

Warning, the name changecoords has been redefined

Warning, the previous binding of the name Interactive has been removed and it now has an assigned value

>

> datax:=...

I used the answer given in maple 10,  the error below happened, can you commen on it

restart;

> X:=<1,2,3,4,5,6,7,8,9,10>:

> Y:=3.7,9.39,23.09,58.60,153.41,309.43,1103.63,2988.98,1112.08,22036.47>:

Error, `:` unexpected

> eqn:=a*x+exp(b*x):

> solution:=Statistics:-fit(eqn,X,Y,x,output=parametervalues);

can any body help me?

i want to solve the following differential equation 

d²x(t)/dt² - 0.066405*sqrt((x(t))(2*r-x(t)))+0.00042105*dx(t)/dt



for this I ahve written the following program

restart

with(plots)

eq := diff(x(t), `$`(t, 2))-0.66405e-1*sqrt((x(t))(2*r-x(t)))+0.42105e-3*(diff(x(t), `$`(t, 1)))

pars := {r = 1}

eq := subs(pars, eq)

Hi,

Thanks a lot for your inputs and help to my previous post. Being novice, I learnt a lot from your inputs.

I am trying to solve a new nonlinear ode problem with the following boundary conditions bcs1 and bcs2 saperately:

a:= -1.24:

slope:= 1: # slope is varying with L

ode:= diff(y(x),x$2) –a*y(x) + y(x)^3 - y(x)^5  = 0

bcs1:= D(y)(0) = 0,   D(y)(L) = slope;

I am trying to create a certain visual effect in a Maple document / worksheet.

Basically, I have a small table with colored cells that I want to embed in a worksheet with an altogether different fill color. This sounds simple enough, but it appears that Maple's tables don't allow this.

I would like to compute the Lie algebra cohomology of a complex lie algebra g in a representation h/g where h is a Lie algebra containing g. is it possible?if yes, how. thank you.

Hi,

I used the dsolve command mentioned by Maple experts in the earlier blog to solve the following ode with bcs.

ode:= diff(y(x),x$2) + 1/x *diff(y(x),x) + 0.6*y(x) + y(x)^3 - y(x)^5  = 0

bcs:= D(y)(0) = 0,   y(d/2) = 0.8 * y(0)

The ode is a spherical coordinate system. The radius is defined by ‘x’ and the diameter by 'd'. 

The...

Hello!

I have a question about array/Array, as the picture illustrated, if applying a function to the entries of an array or Array, for example, map, then the results which maple yields lack of commas, as we can see, each entry in array/Array is so close and if the entries are very complex, then a confusion will be easily caused.

Is there any way to conquer it?

Hey peeps

I'm quite new to maple, and to this site, so I hope I do this properly.

I'm trying to make a procedure, that througout the procedure divides 2 numbers. But I need it to round down to the nearest integers, at all time, as I need an integer as output. I have searched quite a lot, and haven't found anything that helps me to do this.

The procedure is the following:

walla := proc (x) local y, z, w;

y := x;

Ques.mw In the WS attached,I want to specify that x1,x2,y1,y2 are real.I don't want the complex conjugate sign over the products in the hermitian conjugate matrix.

Also there are 2 examples of "Upper Shift" matrix- 3by3 & 4by4.I need a general index notation for this kind of matrix.(e.g. kronicker delta_i,j represents identity matrices).I tried with kronicker delta_i+1,j;but it doesn't give...

Maple 14.01 is now available. It provides updates in many areas, including:

• Mathematics: Updates to the VectorCalculus, DifferentialAlgebra, MathematicalFunctions, and Student packages, the convert command, and tools for solving differential equations
• Interface: Enhancements to context menus, tables, embedded components, document blocks, and the start-up code region
• Plotting:

Hej!

I've some problems in factorising terms in an equation.

As one can see in the maple file below, the terms "cosh((1/2)*a+(1/2)*y)", "cosh((1/2)*a-(1/2)*y)", "sinh((1/2)*a+(1/2)*y)" and "sinh((1/2)*a-(1/2)*y)" recur in the equation. So want to factorise those terms, but it doesn't work with factor().

Does anybody have a solution, how I can simplify that equation?

test.mw

For a eqation such as y(t)=2*sin(3*t)

I want to solve its fourier series under the different step,

and plot corresponding figure like the picture below

How should i do?

help me please.

Hello,

I have spent all morning trying to create a surface plot from a set of survey data that I have. The data I have is in the format xi, yi, zi. It is in Excel in columns. I read some previous questions on this topic, but my plot just comes out all jumbled.  Here is what I coded.

As soon as I figure out how to post images, i will post the plot...