r:basics
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r:basics [2019/09/19 12:02] – [Basic (descriptive) Statistics] hkimscil | r:basics [2019/09/25 10:32] (current) – [Performing Vector Arithmetic] hkimscil | ||
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[1] 11.49988 | [1] 11.49988 | ||
</ | </ | ||
+ | |||
+ | $$ r = \frac {\text{covariance (x, y)}} {sd(x) * sd(y)} $$ | ||
< | < | ||
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</ | </ | ||
</ | </ | ||
+ | |||
+ | < | ||
+ | > dlist <- list(small, | ||
+ | > dlist | ||
+ | [[1]] | ||
+ | [1] 0.6739635 1.5524619 0.3250562 1.2143595 1.3107692 2.1739663 | ||
+ | [7] 1.6187899 0.8872657 1.9170283 0.7767406 | ||
+ | |||
+ | [[2]] | ||
+ | [1] 10.526448 | ||
+ | | ||
+ | |||
+ | [[3]] | ||
+ | | ||
+ | [7] 100.46707 | ||
+ | > lapply (dlist, | ||
+ | [[1]] | ||
+ | [1] 1.24504 | ||
+ | |||
+ | [[2]] | ||
+ | [1] 9.560325 | ||
+ | |||
+ | [[3]] | ||
+ | [1] 99.946 | ||
+ | > sapply(dlist, | ||
+ | [1] 0.5844025 0.9920282 0.8135503 | ||
+ | |||
+ | </ | ||
< | < | ||
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</ | </ | ||
+ | sequence ('' | ||
+ | < | ||
+ | x <- seq(-4, 4, length=10000) | ||
+ | y <- dnorm(x, mean=0, sd=1) | ||
+ | plot(x, y, type=" | ||
+ | |||
+ | </ | ||
====== Comparing Vectors ====== | ====== Comparing Vectors ====== | ||
< | < | ||
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====== Performing Vector Arithmetic ====== | ====== Performing Vector Arithmetic ====== | ||
+ | see [[:social network analysis]] | ||
+ | |||
< | < | ||
> w <- c(1, | > w <- c(1, | ||
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[1] -1.2649111 -0.6324555 | [1] -1.2649111 -0.6324555 | ||
</ | </ | ||
+ | |||
+ | <WRAP box help>get variance of v without using var() function. | ||
+ | </ | ||
< | < | ||
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| <- << | | <- << | ||
| ? | Help | Recipe 1.7 | | | ? | Help | Recipe 1.7 | | ||
- | |||
< | < | ||
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<WRAP box help> | <WRAP box help> | ||
fill values less than 2 with zeros in stu matrix | fill values less than 2 with zeros in stu matrix | ||
+ | < | ||
</ | </ | ||
r/basics.txt · Last modified: 2019/09/25 10:32 by hkimscil