Add single point to plot using Plots pyplot()

General Usage
1

Hi,

I would like to add a point to a graph, like a heatmap.

It works fine if I do

plot!([1.],[1.],color="blue")

but if use

plot!([a.],[a.],color="blue")

where a is a variable Int64, I get the error unexpected ]. Removing ] does not change anything

2

Your issue is not really a plotting issue but a parsing issue. For legal numbers, the parser interprets a dot as shorthand for .0, but this doesn’t work for variables, where it is interpreted as field access (as in myobj.field)

Consider:

julia> 1.
1.0

julia> a = 1
1

julia> [a.]
ERROR: syntax: unexpected "]"

julia> [a]
1-element Array{Int64,1}:
 1

So try removing the dot in your code. For plotting points also consider using scatter instead of plot

1 Like
3

Very clear, it works now. Thanks.