Yeah, I think I got the solution to my problem. My plots are from dsolve command and the unknown is a function that has small values. Simply I multiplied it for a scale factor 10000 times greater. In the label of the y-axis, I just indicated that the unit is 10E-4.

Thanks to all for help me.

Regards!

Hi friend,

I need more details about your ODE to help you. Are "phi" and "theta" constants? What is the independent variable?

Regards!!

Hi friend,

I had a similar problem. When I checked my worksheet, I noticed that the output of dsolve/pdsolve comands with "numeric" option disappeared. I suggest you to switch the semicolon by a colon and supress the output.

Regards!!

Did you try change the precison by clicking in the Tools menu->Options->Precision tab? Set the precision.

Also, try to set the global variable Digts for smaller values.

Regards,

Tuti.

Hi Colleague,

Did you try to specify the end conditions as the same manner of initial conditions? Try to include the "range" option also. A good idea is solve this type of problem in easier cases (single ODE) and check. Request the solution in smaller t values and see what happens.

Regards,

Tuti.

Hi Colleague,

Yes, I believe. In fact, the result that you show me is right. If you make the calculation in HP or CASIO calculator, they return the same Maple result. Did you try to exchange "1.1611" by "1.611"? As I say, the answer is 0.705.

I guess you forgot the "exp" in your last posts.

Regards,

Tuti.

Hi Colleague,

I found your error. You typed "1.1611" instead of "1.611". If you type the last value, the K value will be 0.705. Try it!

I hope being useful. 

Regards,

Tuti.