## 15 Reputation

11 years, 220 days

## Thanks If it was say 3.5*10^10*x^2 that ...

Thanks If it was say 3.5*10^10*x^2 that i wanted to plot maple gives these as long numbers on the scale is there any way to constarin this to g*10^5 say i.e so that it is essentially 10^ rather than a long number?

## thanks that is awesome, can I ask how yo...

thanks that is awesome, can I ask how you arose at the intitial conditions that you used because i am always unsure what to do here?

## No sorry I didn't type it in clearly. I ...

no sorry that isnt what i mean it was just a differnetial equation

## yeah thx figured it out and have: ...

yeah thx figured it out and have:

```

```
 >
 (1)
 (2)
 >
 >
 >
 (3)
 >
 (4)
 >
 >
 >
 >
```

except now the first one is wrong as it should be constant between x=0 and 4.6*10^2, also can they easily be coombined?

```

## hi thanks guys, with that change though ...

hi thanks guys, with that change though maple will produce a graph with nothing on it, does anyone know why?

## thx guys, is there a setting to allow fo...

thx guys, is there a setting to allow for X(1) to be a very large number, because when i try and plot say 10^20 it wont work?

## thx guys you have been really helpful, i...

thx guys you have been really helpful, is it possible to get these bot honto the same plot?

## thx, i have two quick questions, is it p...

thx, i have two quick questions, is it possible to joing the two up? Clearly there would have to be a gap in between. Also is it possible to plot multpiple piecewise functins, or piecewise and non piecewise functions on the same graph?

## yeah thats what i thought it is so frust...

yeah thats what i thought it is so frustrating i am just trying to plot some graphs grrrr.

If T(x)=R^1/4(x)/x, would that be enough?

## Sorry it's hard for me to understand wha...

Sorry it's hard for me to understand what i actuially need to do to plot the equation, i have a simpler form which if i can do then i can work the above one out for myself.

The set of diffferential equations are:

`> U := diff(X(x), x) = -10*(1-5*T(x)^2)^(1/2)*x*X(x)/(X(x)*x+R(x)), diff(R(x), x) = 10*(1-5*T(x)^2)^(1/2)*x^2*X(x)/(X(x)*x+R(x));                                       (1/2)                                   /          2\                         d           10 \1 - 5 T(x) /      x X(x)            --- X(x) = - ----------------------------,            dx                 X(x) x + R(x)                                                 (1/2)                                  /          2\       2                  d         10 \1 - 5 T(x) /      x  X(x)            --- R(x) = -----------------------------             dx                X(x) x + R(x)        > initial; R(x) = 0, X(x) = 10;`
` `
`I again apologise for not being very helpful earlier.`

## Hi I get this error and thew graph won't...

Hi I get this error and thew graph won't update from 5,

`Error, (in dsolve/numeric/process_input) incorrect form for derivatives: {(diff(diff(F(t), t), t))(x)}Error, (in plots/odeplot) input is not a valid dsolve/numeric solution`
` `
`thx`

## yeah i have this equation but want to pl...

yeah i have this equation but want to plot R(x), Z(x) and P(x) against x

## Thanks i actually wanted to plot values ...

Thanks i actually wanted to plot values from 10^-10 to 10^10 and thought tha perhaps the answer would help me to do that, is it possible to get maple to insert values with an increment of say 10 in that range?

 Page 1 of 1
﻿