# Filled contour plots in Plots.jl without contour lines and smooth interpolation (GR backend)

**URL:** <https://discourse.julialang.org/t/filled-contour-plots-in-plots-jl-without-contour-lines-and-smooth-interpolation-gr-backend/34796>\
**Category:** Visualization\
**Tags:** plots, gr\
**Created:** [February 18, 2020, 8:06am UTC](https://discourse.julialang.org/t/filled-contour-plots-in-plots-jl-without-contour-lines-and-smooth-interpolation-gr-backend/34796 "2020-02-18T08:06:33Z")\
**Posts on this page:** 1\
**Page:** 3

<div class="post-metadata">

**Author:** ![joa-quim](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/joa-quim/32/227_2.png) [@joa-quim](https://discourse.julialang.org/u/joa-quim)\
**Post date:** [August 29, 2023, 7:28pm UTC](https://discourse.julialang.org/t/filled-contour-plots-in-plots-jl-without-contour-lines-and-smooth-interpolation-gr-backend/34796/41 "2023-08-29T19:28:48Z")

</div>

You mean contour one grid? Like in

```julia
using GMT

G = GMT.peaks(N=8) # Create a dumb very small grid se we can see all of its numbers
Gridline node registration used
x_min: 0.0 x_max :10.0 x_inc :2.0 n_columns :6
y_min: 0.0 y_max :10.0 y_inc :2.0 n_rows :6
z_min: 0.0 z_max :10.0
8×8 Matrix{Float32}:
  6.74662f-5 0.00234345 -0.00289526 -0.156239 -0.234643 -0.0561168 -0.0021941 -5.86418f-6
  0.000709284 0.0252743 -0.100085 -2.42985 -3.59033 -0.82773 -0.0259816 0.000166233
 -0.00160873 0.0259868 0.792868 -0.891183 -4.8579 -0.559861 0.151032 0.00677258
 -0.0228549 -0.578283 -0.834896 3.62408 0.439527 2.98756 0.821138 0.028167
 -0.026329 -0.753474 -2.56385 0.810568 0.15759 3.00589 0.800088 0.0273207
 -0.00537586 -0.112819 0.619229 5.63665 5.59131 1.97303 0.25099 0.00707602
  0.000235204 0.0367531 0.840585 3.81141 3.81001 0.912933 0.0560706 0.000895326
  3.29888f-5 0.00292144 0.0569759 0.249575 0.24956 0.0578584 0.00315682 4.10297f-5

C = makecpt(T=(-7,9,2));
contourf(G, C, show=true)

```

(more [here](https://www.generic-mapping-tools.org/GMTjl_doc/examples/contours/01_contour_examples/#example_15292688772320955574))

 ![GMTjl_j](https://global.discourse-cdn.com/julialang/original/3X/3/9/399f0817581255acc4fe363d4f767be8d9645ec6.png)

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