Search found 14 matches

by qingri212
Tue Mar 19, 2013 1:53 am
Forum: Vensim
Topic: Error: Nothing Selected
Replies: 6
Views: 5637

Re: Error: Nothing Selected

I have no trouble moving the level around. Can you explain step by step what you do so I can try the same steps here? What other software do you have installed that might be monitoring the mouse/windows? I just use the software as usual. Maybe it is the win7 system. When I used it on winXP, everyth...
by qingri212
Tue Mar 12, 2013 1:48 pm
Forum: Vensim
Topic: Error: Nothing Selected
Replies: 6
Views: 5637

Re: Error: Nothing Selected

Administrator wrote:Can you upload your model and give us instructions on exactly what you are doing?

And if you are using DSS, can you please put your serial number in your profile.

Tony.
It does not matter which model I am building. Every model will have the problem.
by qingri212
Tue Mar 12, 2013 12:36 pm
Forum: Vensim
Topic: Error: Nothing Selected
Replies: 6
Views: 5637

Re: Error: Nothing Selected

Administrator wrote:Your profile mentions that you use PLE.

Are you trying to move something that is on a template view? Make sure "View->Use Template" is unticked and see if the problem goes away.

Tony.
I make the "Use Template" unticked but it doesn't work.
by qingri212
Tue Mar 12, 2013 9:05 am
Forum: Vensim
Topic: Error: Nothing Selected
Replies: 6
Views: 5637

Error: Nothing Selected

I am using DSS on win7 system. Every time I move or change an object in Vensim, no matter it is a variable or box, there is a box like the pic attached. What can I do? It drives me crazy cos I have the box popping out hundreds of time each day now!
by qingri212
Fri May 21, 2010 1:43 am
Forum: Vensim
Topic: Dimentional Unit in equation
Replies: 9
Views: 9154

Good point

I will show you the way in Powersim
I just think that would be a little bit more convenient sometimes.

in Powersim you can write like:
(Y widget; x widget/month)

Y = X*1<<month>>
then the unit of Y become widget
by qingri212
Fri May 21, 2010 1:35 am
Forum: Vensim
Topic: the plot in vensim
Replies: 9
Views: 7399

the second pic
by qingri212
Fri May 21, 2010 1:35 am
Forum: Vensim
Topic: the plot in vensim
Replies: 9
Views: 7399

I know there were computors, but the book I have has no graph done by computors(like the first pic in attachment). What I want to do is replacing all the handwriting in the way of PC, making it more readable for Chinese students who prefer reading "formal books". And, I think some pic are ...
by qingri212
Thu May 20, 2010 2:36 am
Forum: Vensim
Topic: Dimentional Unit in equation
Replies: 9
Views: 9154

Originally posted by LAUJJL You cannot write an equation with units in it. Unless you specify that 1 widget is a constant whose value is 1 and unit is widget. JJ At last... So I should not think of it... I can do it in Powersim software, so, maybe it is one of the needed development of Vensim. Than...
by qingri212
Thu May 20, 2010 2:25 am
Forum: Vensim
Topic: the plot in vensim
Replies: 9
Views: 7399

Thanks

Originally posted by LAUJJL I do not see the interest to put on the same graph two variables with different units. The interest to put two variables on the same graph is to compare them as you do with different runs. There is no interest to do that, because they are not comparable having different ...
by qingri212
Wed May 19, 2010 9:58 am
Forum: Vensim
Topic: Dimentional Unit in equation
Replies: 9
Views: 9154

Originally posted by bob@vensim.com What JJ describes is the best practice. It is often called normalization. If you do want the x axis to be interpreted as actual values rather than normalized values use the format output = my lookup(input / unit widget) unit widget = 1 or equivalently output = WI...
by qingri212
Wed May 19, 2010 9:52 am
Forum: Vensim
Topic: the plot in vensim
Replies: 9
Views: 7399

Thank you

Originally posted by bob@vensim.com Click on one variable to select it, then shift click on the second, then click on the Graph tool. Alternatively create a custom graph. Yes, I know that. But the thing is, I need the graph shows the second y axis at the right side, for if two many y axises at left...
by qingri212
Wed May 19, 2010 9:48 am
Forum: Vensim
Topic: Dimentional Unit in equation
Replies: 9
Views: 9154

Thank you

Originally posted by LAUJJL the standard way to do that is: Y = standard value of y * lookup function(x / standard value of x) where standard value of y has unit widget/month and standard value of x has unit widget and the ratio x / standard value of x has unit dimensionless (DMNL). The standard va...
by qingri212
Wed May 19, 2010 1:43 am
Forum: Vensim
Topic: the plot in vensim
Replies: 9
Views: 7399

the plot in vensim

How to plot more than two kinds of variables( for example, a level variables whose unit is kg, and a rate whose unit is m/s) into one graph, which has only one x axis( unit is time, like month) and two or even more y axis(all y axis at left side , or one left one right)?
by qingri212
Wed May 19, 2010 12:57 am
Forum: Vensim
Topic: Dimentional Unit in equation
Replies: 9
Views: 9154

Dimentional Unit in equation

I want to get a y with a lookup about x but the unit of x is widget and the unit of y is widget/month how to make the unit of y be widget/month in a lookup function? I have tried to write it as "withlookup{x/1 month..." or "withlookup{x/1~month..." or "withlookup{x/1<month>....