Comparison of multiple groups using spm1d

[TakumaInai]

Dear Dr. Todd,

I have a basic queation.
Now, I want to compare waveforms in 3 conditions.
For example,
n = 28
Condition 1: Normal walking
Condition 2: Slow walking
Condition 3: Fast walking
Variable: Knee sagittal joint angles (one gait cycle)

Can I use spm1d to compare the knee sagittal joint angle waveforms between 3 conditions?
If it is possible, would you tell me how to conduct it?

Sincerely yours,
Takuma Inai
AIST

[0todd0000]

Hello Takuma,
Yes, spm1d can be used to compare three conditions. It sounds like the appropriate function is one of the following:

• spm1d.stats.anova1: one-way ANOVA; if different subjects performed the three conditions
• spm1d.stats.anova1rm: one-way repeated-measures ANOVA; if each subject performed all conditions.

Here are links to examples:

• anova1 example
• anova1rm example

Press "Source code" at the links above to download full scripts.