R Plot - Y Axis and plotted values are not the same (values from txt file)

Question

I am somewhat new to R and I am trying to plot values from real data . x axis is the time and y axis real values but in graph y axis is between 0 and 100, but the real values of y are different.

I need your help.Thank you

Please provide us with an [example of your data](http://stackoverflow.com/a/5963610/2005219) — Edward R. Mazurek, May 24 '16 at 15:22
my data just contain one column : 9,12368 8,90582 8,92218 8,53934 7,99324 7,53952 7,51255 7,1065 6,91431 6,9704 7,92692 7,74947 7,10618 6,50479 5,9741 5,08136 4,32405 3,86809 3,4377 3,54596 3,07406 2,92242 1,67285 1,11221 0,501673 — Im.ba, May 25 '16 at 05:40
If your data in file have comma as decimal separator then in function `read.table()` add argument `dec=","`. — Didzis Elferts, May 26 '16 at 11:28
[This a capture of data imported into Rstdio](http://i.stack.imgur.com/ZaAyD.gif) — Im.ba, May 26 '16 at 11:59
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - [From Review](/review/low-quality-posts/12487292) — Cristik, May 26 '16 at 19:29

cuttlefish44 · Answer 1 · 2016-05-26T08:13:31.373

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y <- c(9.21368, 8.90582, 8.92218, 8.53934, 7.99324, 7.53952, 7.51255, 7.1065, 6.91431,
       6.9704,  7.92692, 7.74947, 7.10618, 6.50479, 5.9741, 5.08136, 4.32405, 3.86809, 
       3.4377, 3.54596, 3.07406, 2.92242, 1.67285, 1.11221, 0.501673)
t <- 1 : length(y)
plot(t, y)

# Length(y) and length(t) must be same.

edited May 26 '16 at 08:13

answered May 26 '16 at 06:10

cuttlefish44

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Thank you for your response, like that it works but when I read y values from txt file I can't get the same result , y axis can't dispaly real values ! – Im.ba May 26 '16 at 08:32

score 0 · Answer 2 · edited May 26 '16 at 11:26

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The y-axis is always like the x axis but in reality is not like that:

the y-axis is always like the x axis but in reality is not like that

edited May 26 '16 at 11:26

Brian Tompsett - 汤莱恩

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answered May 26 '16 at 08:42

Im.ba

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score 0 · Answer 3 · answered May 26 '16 at 09:27

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You can view your y-axis values in the plot, by adding text function

    y <- c(9.21368, 8.90582, 8.92218, 8.53934, 7.99324, 7.53952, 7.51255, 7.1065, 6.91431,
           6.9704,  7.92692, 7.74947, 7.10618, 6.50479, 5.9741, 5.08136, 4.32405, 3.86809, 
           3.4377, 3.54596, 3.07406, 2.92242, 1.67285, 1.11221, 0.501673)
    t <- 1: length(y)
    plot(t,y)
    text(t,y,pos=3, cex=0.7)

answered May 26 '16 at 09:27

Arun kumar mahesh

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when I read y values from txt file, y-axis can't show real values, it gives me graph like that http://i.stack.imgur.com/Occhh.png – Im.ba May 26 '16 at 11:20

R Plot - Y Axis and plotted values are not the same (values from txt file)

3 Answers3