## 12 Reputation

17 years, 76 days

## MaplePrimes Activity

### These are replies submitted by ounlopez

Hi, I am trying to duplicate what you were doing in my own program. When I type the code above, I get an error "Error, invalid input: writedata[Append] expects its2nd argument, Data, to be of type {set, matrix, hfarray, list, array(1), list(list}, but received soln1[2,1]" My solution is named soln1. I am wondering if you can tell me if you received this error. Or, how do I change my data to something it likes. I am solving a system of three differential equations, and want to see the results in a spread sheet over time. Thanks! Regards, Steve

Hi, I am trying to duplicate what you were doing in my own program. When I type the code above, I get an error "Error, invalid input: writedata[Append] expects its2nd argument, Data, to be of type {set, matrix, hfarray, list, array(1), list(list}, but received soln1[2,1]" My solution is named soln1. I am wondering if you can tell me if you received this error. Or, how do I change my data to something it likes. I am solving a system of three differential equations, and want to see the results in a spread sheet over time. Thanks! Regards, Steve

## another piecewise question...

Hi all, Concering my question above, what if I want more than one of my dependent variables to have bounds? For example, B(t) and N(t)? And what if the dependent variable doesn't actually show up in the ode? I want 1000<=N(t)<=7000 and 0

## another piecewise question...

Hi all, Concering my question above, what if I want more than one of my dependent variables to have bounds? For example, B(t) and N(t)? And what if the dependent variable doesn't actually show up in the ode? I want 1000<=N(t)<=7000 and 0

## exactly, let me see if I can...

exactly, let me see if I can get that working! Thanks, Steve

## exactly, let me see if I can...

exactly, let me see if I can get that working! Thanks, Steve

## not sure its Stopping Condition...

Thanks, but I do not want the solver to stop once it gets there, I just don't want the variable B to get any higher. It can get lower, and the other variables can keep doing their thing. I am building a natural resource model, where there are limits to this one variable. Thanks for your assistance on this! Cheers.

## not sure its Stopping Condition...

Thanks, but I do not want the solver to stop once it gets there, I just don't want the variable B to get any higher. It can get lower, and the other variables can keep doing their thing. I am building a natural resource model, where there are limits to this one variable. Thanks for your assistance on this! Cheers.
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