# GMT.jl: Quantile-weighted color bar & movie function

**URL:** <https://forum.generic-mapping-tools.org/t/gmt-jl-quantile-weighted-color-bar-movie-function/4896>\
**Category:** GMT.jl Q&A\
**Created:** [May 14, 2024, 3:47pm UTC](https://forum.generic-mapping-tools.org/t/gmt-jl-quantile-weighted-color-bar-movie-function/4896 "2024-05-14T15:47:30Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![Cornec\_H](https://avatars.discourse-cdn.com/v4/letter/c/2bfe46/32.png) [@Cornec\_H](https://forum.generic-mapping-tools.org/u/Cornec_H)\
**Post date:** [May 15, 2024, 3:14pm UTC](https://forum.generic-mapping-tools.org/t/gmt-jl-quantile-weighted-color-bar-movie-function/4896/5 "2024-05-15T15:14:16Z")

</div>

Thank you both so much! I have managed to save all the maps using the following function:

```auto

function MakeTempMaps()
    cd("~Plots/Average Temperature")
    latitude = datamatrix[:, 2]
    longitude = datamatrix[:, 3]
    df1 = [longitude latitude datamatrix[:,4]]
    grd1 = xyz2grd(df1, region=(-180, 180, -60, 75), spacing=(1.0, 1.0))
    C = grd2cpt(grd1, cmap=:polar);
    for i in 1:150
        temp = datamatrix[:,i+3]
        data_points = [longitude latitude temp]
        grid = xyz2grd(data_points, region=(-180, 180, -60, 75), spacing=(1.0, 1.0))

        grdimage(grid, proj=:equidistCylindrical, frame=:af,cmap=C, title = "Temperature Distribution Map ("*string(i+1989)*")", colorbar = true)
        coast!(region=(-180, 180, -60, 75), water="lightblue", proj=:equidistCylindrical, savefig = string(i+1989)*".jpg")
    end
    cd(fig_path)
end
MakeTempMaps()

```

The maps now look like this:

 ![1990](https://canada1.discourse-cdn.com/flex047/uploads/gmt/original/2X/b/b614bb5fd14c8d579077d6398ff0fb3234b37ee5.jpeg)

Thank you again for your help. If there is a simple way to use the movie function to create an mp4 out of the images, that would be great, but otherwise I can probably use some other package to string the jpg files together.

One last thing: Is there a cmap argument or color palette (both in color and black/white) with higher contrasts that is easier to read or that you recommend? I am not entirely satisfied with “cmap = polar”.

Thank you for all your suggestions!  
Regards

---

_[View the full topic](https://forum.generic-mapping-tools.org/t/gmt-jl-quantile-weighted-color-bar-movie-function/4896)._