1. Creating a canvas
To create a graphic canvas in a calculation block, we use the function fig.
The canvas appears after the input box, and after any textual outputs. Several canvases can be created in the same calculation block; they then appear one above the other. The graphics instructions that are executed after calling fig act on the canvas that has just been created.
2. Graphic style
A graphic style is defined in a style object, whose properties are:
- style.stroke (string): color of the lines, for example “black”
- style.fill (string): color of filling of shapes
- style.font (string): character font, for example “bold 12pt sans-serif”
- style.line (integer): line thickness
3. Plot frame
The frame defines the scale of the plots. The plotframe function defines the frame:
the plotlabels function displays labels on the axes and a title:
The plotgrid function draws a grid in the frame. $
Below is an example of the use of the three previous functions:
fig(600,400)
plotframe({xmin:0,xmax:10,ymin:-1,ymax:1},{fill:”black”,font:”10pt sans-serif”})
plotgrid({nx:10,ny:10},{stroke:”#aaa”,line:1})
plotlabels({x:”x”,y:”y”,title:”titre”},{fill:”black”,font:”bold 12pt sans-serif”})
