I plot the chart but the line does not appear

[wanderbeg]

Hi Guys,

I'm a new with the Vensim. I would like to know where I am wrong, because I plot the chart but the line does not appear.

I have attached the image.

Thanks,

[tomfid]

What do you get if you use the table tool?

[wanderbeg]

I want to get a graph / table showing the total demand for water (Urban demand + irrigation).

[Quame]

Are you reading any time series data from excel?

[wanderbeg]

Are you reading any time series data from excel?

Irrigation data are time series.

[Quame]

If you are using GET DATA function to import the time series data, then this is the cause. VENSIM does not recognize excel dates. A way I found around this is: in the model settings select a base date (when time =0) to correspond to a date prior to the first date in your excel. Then number the dates in your excel from say 1 to 100. Your initial time under model setting is 1 and final time is 100. Enter the same values under the control panel. Check time as date in the control panel and that should fix it. I am assuming with the above configuration that your time step is say day and your dates in excel are continuous, ie no missing date.

[Quame]

Let VENSIM read the numbers rather than the dates

[wanderbeg]

I modified the comma in the numbers of the irrigation database and got the graph with the row / table with values. However, it did not add up to the urban demand, ie the water demand graph is only with the irrigation data.

[Administrator]

Can you upload the model? It's impossible to really help with just screen shots.

[wanderbeg]

I've been able to solve the problem. Problem of standardization of the comma.

Thanks,