# Overlaying contour lines for a specific value

**URL:** <https://discourse.julialang.org/t/overlaying-contour-lines-for-a-specific-value/111729>\
**Category:** New to Julia\
**Tags:** plotting, contouring\
**Created:** [March 17, 2024, 5:24pm UTC](https://discourse.julialang.org/t/overlaying-contour-lines-for-a-specific-value/111729 "2024-03-17T17:24:37Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dharmik](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dharmik/32/51086_2.png) [@dharmik](https://discourse.julialang.org/u/dharmik)\
**Post date:** [March 17, 2024, 5:24pm UTC](https://discourse.julialang.org/t/overlaying-contour-lines-for-a-specific-value/111729/1 "2024-03-17T17:24:37Z")

</div>

Hi! I created a scatter plot representing a ‘matrix’ of values and coloured it in using heatmap. I want to overlay a contour line on it for a specific value in this matrix but I can’t figure out how – any help would be greatly appreciated! This is the code that produces my plot:

```julia
plot = scatter(x, y, matrix, st=:heatmap, xlabel="x vals ()", ylabel="y vals ()", title="blah blah")
display(plot)

```