Hello,
To indicate probability densities instead of counts on a histogram, I
specify freq = FALSE.
However, I expect that summing all top y coordinates over all the
intervals of the histogram will provide 1.
1)
v <- c(0.2885, 0.2988, 0.3139, 0.2615, 0.3179, 0.3163, 0.2583, 0.3052,
0.2527, 0.3147, 0.3235, 0.2408, 0.2480, 0.3108, 0.3577, 0.2829, 0.2694,
0.3275, 0.3314, 0.2639, 0.3076, 0.3346, 0.2933, 0.3585, 0.2678, 0.3338)
hist(v, freq = FALSE)
With the above example, roughly, I obtain 3 * 8 + 10 + 14 + 4 = 52
Besides, I do not understand the units on the y axis. I would have
expected decimals.
2) In contrast, I am satisfied with the units on the y axis with the
example below :
v <-
c(1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9,9,9)
hist(v, freq = FALSE)
3) Again, with the example below, I wonder why the unit axis does not
show the interval [0,1] (or maybe [0%,100%]). Proportions are correct
but the indication 1.4 is not usual.
v <- c(1,2,2,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4)
> hist(v, freq = FALSE)
I thank you in advance for any explanation about the way to force the y
axis to restrain to interval [0,1] on an histogram.
Best regards,
Christine Sinoquet
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