Re: [R] T-test by groups

Uwe Ligges wrote: > > > Ingrid Tohver wrote: >> I would like to run a t-test within a "by" group function. My >> dataset, "error", is organized as the following (I have 133 Sites): >> >> Site week Dataset Region lat_map long_map mean_tsim diff20 diff40 >> diff80 >> ALFI 15 USACE UC 4

Re: [R] T-test by groups

Ingrid Tohver wrote: I would like to run a t-test within a "by" group function. My dataset, "error", is organized as the following (I have 133 Sites): Site week Dataset Region lat_map long_map mean_tsim diff20 diff40 diff80 ALFI 15 USACE UC 48.15625 -117.0938 8.87 1.34

[R] T-test by groups

I would like to run a t-test within a "by" group function. My dataset, "error", is organized as the following (I have 133 Sites): Site week Dataset Region lat_map long_map mean_tsim diff20 diff40 diff80 ALFI 15 USACE UC 48.15625 -117.0938 8.87 1.34 1.90 2.98 ALFI 16