# Clarification on Y-axis height within the same tumor type in expression plot **URL:** \ **Category:** Q&A\ **Tags:** genetic-screens, data\ **Created:** [October 17, 2024, 8:04am UTC](https://forum.depmap.org/t/clarification-on-y-axis-height-within-the-same-tumor-type-in-expression-plot/3666 "2024-10-17T08:04:08Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Giacomo\_Graziano](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.depmap.org/giacomo_graziano/32/980_2.png) [@Giacomo\_Graziano](https://forum.depmap.org/u/Giacomo_Graziano)\ **Post date:** [October 17, 2024, 8:04am UTC](https://forum.depmap.org/t/clarification-on-y-axis-height-within-the-same-tumor-type-in-expression-plot/3666/1 "2024-10-17T08:04:08Z")
Hello, I was analyzing a plot showing the expression of a gene (PHGR1) in LUAD and COAD cell lines, and I noticed that within each tumor type, the points (representing the cell lines) have varying heights along the Y-axis. I understand that the Y-axis differentiates between the two tumor types, but could you clarify what the difference in height represents within a single tumor type (LUAD or COAD)? Is it purely for visual separation, or does it carry any specific biological or technical meaning? ![Screenshot 2024-10-17 100055](https://canada1.discourse-cdn.com/flex035/uploads/depmap/original/2X/c/ce541df8e8f2b909d24ca3b8b8e09134413e16b2.png) ---
**Author:** ![pmontgom](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.depmap.org/pmontgom/32/4_2.png) [@pmontgom](https://forum.depmap.org/u/pmontgom)\ **Post date:** [October 18, 2024, 8:55pm UTC](https://forum.depmap.org/t/clarification-on-y-axis-height-within-the-same-tumor-type-in-expression-plot/3666/2 "2024-10-18T20:55:52Z")
No, there is no biological or technical meaning in the y-values. The Y-values are jittered to avoid all points being plotted on top of one another. Purely for visual separation. Thanks, Phil