## Plotting Multiple Equations¶

Let’s dive right in to the first the example. We may want to simulate different equations for a specific simulation scenario.

We want to simulate the equation ‘openTasks’ and ‘closedTasks’ for the scenario “scenario80”. Play around with the parameters for the x/y labels and title.

You may either use the `scenario_managers` parameter and supply a list of all scenario Managers (by name) you want to plot the simulation results for. Or you use the specific `scenarios' names`. You may of course as well use both if you have duplicate names (one name in multiple scenario managers).

```from BPTK_Py.bptk import bptk
bptk = bptk()

bptk.plot_scenarios(
scenario_managers=["smSimpleProjectManagement"],
scenarios=["scenario80"],
x_label="t",
)
```

## Changing Start Date And Frequency¶

In the above example, we did not specify the `freq` and `start_date` parameters. So the series just plots the values of t for the x axis. Using the mentioned parameters you can generate time series data. Let us set `freq="M"`and `start_date="1/11/2017"`. Of course, the graph is the same. But the y-axis changed. Now the plot assumes daily data, starting at Jan, 11, 2017!

```bptk.plot_scenarios(
scenario_managers=["smSimpleProjectManagement"],
scenarios=["scenario120"],
title="Example Plot with Dates",
x_label="Date",
start_date="1/11/2017",
freq="D"
)
``` ## Renaming The Series¶

The equation names are not the kind of names we want to show the customer. So let use the `series_names` parameter to rename them. Supply the equations to rename and their destination names. Use Python’s dict notation: `{ equation_name : rename_to }`.

The dictionary serves as a set of replacement rules. To correctly rename the series, you have to understand how the framework sets the names of series to avoid ambiguity in series names. If you use more than one scenario manager for plotting, bptk_py will use the following series naming schema: `"scenarioManager"_"scenario"_"equation"`. If you want to replace this, use `series_names={"scenarioManager_scenario_equation": "new name"}`. You may as well define a rule that replaces the name of each scenario Manager with a whitespace. The number of rules is not limited.

Execute the following cell and see how we rename the series:

```bptk.plot_scenarios(
scenario_managers=["smSimpleProjectManagement","anotherSimpleProjectManagement"],
scenarios=["scenario80"],
title="Example Plot with dates, multiple scenario managers and renamed series \n and a very long headline",
x_label="Date",
start_date="1/11/2017",
freq="D",
series_names={
)
``` Hint: Did you notice that you may use \n to start a new line in the headline? This may come in handy for long plot titles.

## Changing The Kind Of Graph¶

You can change the kind of graph using the `kind` parameter! Let us see what happens if we set `kind="line"`!

```bptk.plot_scenarios(
scenario_managers=["smSimpleProjectManagement"],
scenarios=["scenario100","scenario80"], 