This query returns the following table:
SELECT * FROM pcr1;
| pid | strokes | principal_component_1 | principal_component_2 | principal_component_3 |
|---|---|---|---|---|
| 3 | 0.795410174399195 | 0.195110284571174 | -1.17825238356938 | -1.04290585569861 |
| 6 | -0.0331420905999665 | -1.02505176519817 | -1.2375999732885 | 0.257874309966306 |
| 8 | 1.3477783510653 | -1.98240922334734 | 0.159007920294922 | -0.494890984515023 |
| 11 | -0.30932617893302 | -1.00884248343362 | -0.597930103709463 | 0.301060051568942 |
| 13 | 1.3477783510653 | 1.091766978011 | -1.16460787259922 | -2.17662153529429 |
| 16 | 0.519226086066141 | -1.93840477808707 | -0.0623801090526926 | -0.936238178663301 |
| 19 | -1.13787844393218 | -1.14924574475721 | 1.7169286389402 | 0.588543776698959 |
| 21 | -0.585510267266074 | 0.144749031593665 | 1.56905010871958 | 0.52484021423205 |
| 24 | 1.07159426273225 | -0.65879037722031 | 0.120392373582135 | 0.915771821734939 |
| 2 | -1.13787844393218 | -1.27086507768138 | -0.0479281470754135 | 0.732287038132982 |
| 5 | -1.41406253226524 | 0.308542873080395 | 2.70938975527651 | -3.04594531776213 |
| 7 | -0.585510267266074 | -1.61658595260732 | 0.71226267926454 | 0.957505372598163 |
| 10 | 0.795410174399195 | 0.723400299704323 | -3.73227341951059 | 0.574740342890179 |
| 15 | -0.0331420905999665 | 1.50953494759911 | -0.643862090689209 | -0.235674114998759 |
| 18 | 0.519226086066141 | -1.13206482033264 | -0.946451923900274 | 0.153459109295282 |
| 20 | -1.13787844393218 | -0.447229210945602 | 0.669928830364427 | 0.306483821831369 |
| 23 | 0.519226086066141 | 0.956038577607332 | -0.649328546941474 | -0.825039826251437 |
| 1 | 0.243041997733087 | 0.830295227878681 | 0.204892485389732 | -0.205590257682169 |
| 4 | -1.13787844393218 | -1.57924450867301 | 0.122683543836927 | 1.080304476172 |
| 9 | -0.861694355599128 | 3.08093421824054 | 0.794495651675079 | 1.2894482577175 |
| 12 | 1.3477783510653 | 0.0232126330286096 | -0.372098909138089 | -0.867874315202764 |
| 14 | -1.13787844393218 | 3.77988804114414 | 0.62813244997315 | 0.744457517669959 |
| 17 | -1.41406253226524 | 0.121200199618048 | 2.08086374773324 | 0.786060284561275 |
| 22 | 0.795410174399195 | -0.215566553625099 | -0.989679133035365 | -0.169609921563112 |
| 25 | 1.62396243939836 | 1.25962718383174 | 0.134364427459238 | 0.787553912561683 |
The example has reduced the original data set from 25 observations with 7 predictors to 25 observations with 3 predictors (the 3 score variables principal_component_1, principal_component_2, and principal_component_3).