This is a plot of my data

![enter image description here][1]

These are the values:

       xvalues	yvalues
	1	1.091186
	2	2.653722
	3	3.309146
	4	5.206479
	5	5.115582
	6	8.537005
	7	10.013147
	8	9.802291
	9	10.667769
	10	5.809750
	11	9.624475
	12	11.806013
	13	13.587066
	14	14.146781
	15	13.707472
	16	12.891355
	17	19.435301
	18	16.122108
	19	17.768536
	20	23.813027
	21	21.819081
	22	23.556074
	23	21.170983
	24	27.621148
	25	22.932580
	26	20.704689
	27	25.530339
	28	26.227371
	29	26.051016
	30	31.047145


I do now a PCA and a biplot of it

![enter image description here][2]

According to Jeromy Anglim in:   [http://stats.stackexchange.com/questions/2038/interpretation-of-biplots-in-principal-components-analysis-in-r][3]

*The left and bottom axes are showing the loadings; the top and right axes are showing principal component scores.*

I want to be sure I really get this. 

Lets start with the loadings: these can be visualized in R by writing: 

    results <- prcomp(your_data)
    results$rotation 

              PC1        PC2
    xvalues   0.7235616  -0.6902599
    yvalues   0.6902599   0.7235616

    summary(results)

    Importance of components:
                           PC1     PC2
    Standard deviation     12.0747 1.56606
    Proportion of Variance  0.9835 0.01654
    Cumulative Proportion   0.9835 1.00000


Now lets look at the red arrow of xvalues. Its tip is around 0.25 in the x-axis of the loadings. But according to the loadings I have just writen, it should be around 0.72. What am I missing? 

Finally, lets look at the point 1. According to the axes, that is telling me the principal component score. Is it that the coordinate in the new frame of reference? It doesn't make sense to me because I think that the new origin of the axes is around the point (15,15) in the Plot 3. If I look at that (and I guess that I am completely wrong here), the point one should have a coordinate around -20 or so, and not 40. Where is my mistake?


**Update**


I tried plotting this:

    plot(pca_results$x)


![enter image description here][4]

Here it can be seen that the first point has the coordinate that I thought it had to have. But, still, what are the units in the biplot then??



  [1]: https://i.sstatic.net/OaPQx.png
  [2]: https://i.sstatic.net/IqWXm.png
  [3]: http://stats.stackexchange.com/questions/2038/interpretation-of-biplots-in-principal-components-analysis-in-r
  [4]: https://i.sstatic.net/eyNwX.png