Contents

# Array plots

(A)rray plot introduces a new window that lets the user plot many variables at once as a function of time with color coded values. The user can plot for example an array of voltages, `V1, V2, ..., VN` across the horizontal as time varies in the vertical dimension. For example, suppose you have discretized some PDE and want to see the evolution in space and time of the variables. Then use this plotting option. A dialog box will appear asking for

- the first column name of the array ,
- the number of columns,
- the first row,
- the numberof rows,
- the number of rows to skip,
- the max and min of the plotted variable
- the column skip.

For example, if the discretized PDE variables are {\tt u0,u1, ... ,u50}, then type in {\tt u0} for the first element and {\tt 51} for the number of columns. If you want rows 200 through 800 only every 4th time unit, you would put 200 for the first row, 201 as the number of rows, and 4 as the row skip value. You can also set the column skip as well. This is useful if you have defined a series of variables with the array blocks. If the array block is for a two-component system, then set the column skip to 2, to plot every other variable.

The Print button asks you for a file name and top and bottom labels and a render style. The render styles are:

- -1: Grey scale
- 0: Blue-red
- 1: Red-Yellow-Green-Blue-Violet
- 2: Like 1 but periodic

The Style button does nothing yet. The Edit button lets you change ranges and arrays to plot. The Redraw button is obvious.

## Shortcut

In the Initial conditions window each variable has a little box next to it. If you click the box next to the first element in the array and the box next to the last element in the array and then click the Arry button at the bottom, you will get a nice scaled array plot!