Letter of recommendation question

[Aspiring_stats_student2312]

Hello, I have an question regarding letter of recommendation.

I just finish my semester, and I am nearly about to apply graduate programs for biostatistics and statistics.

Is it advisable to ask my real analysis professor (took it in Fall 2020/ A) for letter of recommendation over the Complex Analysis (Spring 2021 / A-)?

I was asking this question, because I was wondering if graduate programs want to see letter of recommendation from real analysis, or classes you took recently?
 

I say both professors know me well equally, but I already asked the real analysis professor for REU, so it is proper to ask him again.

[trynagetby]

I'd say depends on the professor/class. If your Real Analysis class was super basic and your Complex Analysis class was like Stein and Shakarchi or Papa Rudin, I'd pick Complex Analysis. But if they're similar and you got into a competitive REU, you know apriori that the rec has to be somewhat decent right?

Edited May 15, 2021 by trynagetby