log10 vs semilog

5 次查看（过去 30 天）
Samantha Cole
Samantha Cole 2021-4-8
编辑： William Rose 2021-4-8
why does the graph of semilogy(gateVoltage, Draincurrent) not match the graph of plot(gateVoltage, log10(Draincurrent))?
both curves match perfectly in shape, but the semilogy y curve has very small positive y values while the log10 curve has large negative y values.

请先登录，再回答此问题。

回答（1 个）

William Rose
William Rose 2021-4-8
编辑：William Rose 2021-4-8
@Samantha Cole
In the first case, the actual value Draincurrent is plotted on the vertical axis, and the vertical axis has log scaling.
In the second case, the log of Draincurrent is plotted on the vertical axis, and the vertical axis has linear (i.e. normal) scaling. I assume your DrainCurrent is <1 (and >0), which is why log10(Draincurrent) is negative.

类别

在 Help Center 和 File Exchange 中查找有关 Data Logging 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by