Hi,@Carl Love ,thanks for your help, it's useful. Here, I slightly modify your expression to reach my need. Model:= i0*(exp(1000*(v-i*rs)/n0/(259/100))-1)-i;→ change 100 to 10,

Curve:= plot(eval(NewModel, FIT[2]), v= 0..1): → change v= 0.01..1, because v=0 will give an abrupt jump

The following is the...

We have number from 1 to 2014. If we underline the number that divide by 3 and 4, how many pattern of two underlines that next to each other as example 3 , 4 and 8 , 9?

Hello,

1) I would like to ask how I can force Maple to explicitly evaluate a summation over repeated indices. As an example: I would like to do a very simple thing, namely to evaluate the Lagrangian of a free particle in let's say cylindrical coordinates, as follows:

restart:
with(Physics):
with(Physics[Vectors]):
Setup(mathematicalnotation=true, dimension=3):
Coordinates(X=[rho,phi,z]);

Setup(metric = drho^2 + rho(t)^2*dphi^2...

Hi, I want to substitute the result from NonlinearFit into formula and plot together with raw data.

I have two files v.txt and i.txt , v stands for voltage, i stands for current, using formulato fit my raw data,

The picture is captured from my screen.

If I put in the randomize(#) command with the same actual number each time before generating a sequence of random numbers,  I would expect to get the same sequence of results from repeated use of  

round( Generate(distribution(DiscreteUniform(5,10))) )

each time. Actually, I get completely different sequences of numbers.

This also happens with the alternative method of SetState in RandomTools

This is not only annoying...

how can i define an index for a vector?

for example i have

V:=Vector(5)

for i to 20 do
...
V[i]=..

od.

when i write V[i] i want to address it for  "i"'s number from the loop,not element "i" of the Vector. how can i define it ?!
thnx for help 

i have a problem in using command "collect". 

if i uninstall maple and keep some dll,  Is it possible to use openmaple without install maple?

What does convert(max(a,b), piecewise) algorithm use?

convert(max(a,b), piecewise)

convert(min(a,b), piecewise)

Hi All,

I am working on a soil mechanics problem that defines a Cam-Clay model via a system of ODE's and initial values. For this problem there are two parts, the elastic behaviour followed by plastic behaviour.

I have 7 ODE's all wrt to an independant variable called eq. I wish to run the elastic dsolve expresion in such a way that, at the value of eq where a dependant variable f(eq) = 0, I can extract all 7 of the parameters for use as initial...

Maple people:

Does anyone know why, if you plot a discontinuous function of one variable, Maple's default behavior is to try to make the function continuous by adding a vertical line segment?  I don't know why anyone would anyone would ever want to graph a function this way.  As far as I know, you have to use the option "discont=true" to remove the vertical segment, which is a hassle.  I consider this to be practically a bug.  I couldn't...

a) How can i use laplacetransform to solve with maple?

i₁ = i₂ + i₃ 
2i₁ + i₂ + 2i₁ = 30 + 20cos5 + 114sin5  
1/50 i₃ + 4i₃ - 2 i₂ = 0  

i₁(0) = 0

i₂(0)=0

i₃(0)=0

Plot

what should i do ? i face this message when i want to solve my equations? can anyone help me ?view the worksheet