# A question about PCA and visualization

**URL:** <https://discourse.julialang.org/t/a-question-about-pca-and-visualization/42111>\
**Category:** Performance\
**Tags:** question\
**Created:** [June 26, 2020, 2:50pm UTC](https://discourse.julialang.org/t/a-question-about-pca-and-visualization/42111 "2020-06-26T14:50:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![abcde](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/abcde/32/16180_2.png) [@abcde](https://discourse.julialang.org/u/abcde)\
**Post date:** [June 26, 2020, 2:50pm UTC](https://discourse.julialang.org/t/a-question-about-pca-and-visualization/42111/1 "2020-06-26T14:50:35Z")

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How do I draw a scatter plot using the projection matrix obtained from PCA?  
thanks!!  
 ![image](https://global.discourse-cdn.com/julialang/original/3X/1/6/161df4df0fe0cc90b71f24c9c4e15f29584e1663.png)

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**Author:** ![pdeffebach](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pdeffebach/32/10320_2.png) [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Post date:** [June 26, 2020, 3:04pm UTC](https://discourse.julialang.org/t/a-question-about-pca-and-visualization/42111/2 "2020-06-26T15:04:46Z")

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Take a look at Plots.jl. It’s a good plotting library that will let you plot an array like that.