open the expert window.

http://iridl.ldeo.columbia.edu/expert/
Input all the commands starting 'SOURCES...' from under each problem below, and press OK.

### 2(i)  PCA of Western US precipitation
### click on the linkes of desired outputs on the page for figures/output data etc.  

## commands ev 1 RANGE and .Ts if given at the end provides times series of 
## first PC; commands ev 1 RANGE and .Ss gives the first eigen vectors etc.
## command .evaln gives the eigen spectrum

#SOURCES .NOAA .NCDC .CIRS .ClimateDivision .pcp
#  T (Nov 1900) (Dec 2012) RANGE
#  T 12 splitstreamgrid
#  T (Nov) (Dec) (Jan) (Feb) (Mar) VALUES
#  [T]average
# T2 /T renameGRID
  
  
 SOURCES .NOAA .NCDC .CIRS .ClimateDivision .pcp
  T (Dec 1900) (Dec 2012) RANGE
  T 4 boxAverage
  T 12 STEP
    IDIV 201 202 203 204 205 206 207 401 402 403 404 405 406 407 502 504 505 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 2401 2402 2403 2404 2405 2406 2407 2601 2602 2603 2604 2901 2902 2904 2905 2906 2907 2908 3501 3502 3503 3504 3505 3506 3507 3508 3509 4201 4202 4203 4204 4205 4206 4207 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 VALUES
[T]standardize 
 [IDIV][T]svd
	
###### #### 2 (ii) PCA of climate div pcp and correlate with SST
### You can flip the order of the data sets to get correlation of PC of SST
#### with climate division precip.

SOURCES .KAPLAN .EXTENDED .v2 .ssta
  T (Dec 1900) (Mar 2012) RANGE
  T 4 boxAverage
T 12 STEP

  SOURCES .NOAA .NCDC .CIRS .ClimateDivision .pcp
     T (Dec 1900) (Dec 2012) RANGE
  T 4 boxAverage
  T 12 STEP
   IDIV 201 202 203 204 205 206 207 401 402 403 404 405 406 407 502 504 505 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 2401 2402 2403 2404 2405 2406 2407 2601 2602 2603 2604 2901 2902 2904 2905 2906 2907 2908 3501 3502 3503 3504 3505 3506 3507 3508 3509 4201 4202 4203 4204 4205 4206 4207 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 VALUES
   [T]standardize
   [IDIV][T]svd
   ev 2 RANGE
   .Ts
   T 2 index .T replaceGRID
   [T]correlate
 /color_smoothing null def
  X Y fig- colors |
          contours coasts -fig	 
 #########
 
 #### Plot spatial patterns of precip within Ingrid
 ### change ev xx RANGE to plot the desired pattern
 
  SOURCES .NOAA .NCDC .CIRS .ClimateDivision
  a: .SOURCES .WORLDBATH .bath
    :a: .location
     :a: .pcp
      T (Dec 1900) (Mar 2012) RANGE
      T 4 boxAverage
      T 12 STEP
      IDIV 201 202 203 204 205 206 207 401 402 403 404 405 406 407 502 504 505 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 2401 2402 2403 2404 2405 2406 2407 2601 2602 2603 2604 2901 2902 2904 2905 2906 2907 2908 3501 3502 3503 3504 3505 3506 3507 3508 3509 4201 4202 4203 4204 4205 4206 4207 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 VALUES
      [T]standardize
      [IDIV][T]svd
      ev 1 RANGE
      .Ss :a
    X Y fig: lightgrey mask fillby black thinnish solid countries_gaz black thinnish solid lakes black thinnish solid states :fig
       X -130 -102 plotrange
       Y 30 50 plotrange

##### PC2 of SST correlated with Precip

 SOURCES .NOAA .NCDC .CIRS .ClimateDivision
  a: .SOURCES .WORLDBATH .bath
    :a: .location
     :a: .pcp
      T (Dec 1900) (Mar 2012) RANGE
      T 4 boxAverage
      T 12 STEP
      IDIV 201 202 203 204 205 206 207 401 402 403 404 405 406 407 502 504 505 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 2401 2402 2403 2404 2405 2406 2407 2601 2602 2603 2604 2901 2902 2904 2905 2906 2907 2908 3501 3502 3503 3504 3505 3506 3507 3508 3509 4201 4202 4203 4204 4205 4206 4207 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 VALUES
      SOURCES .KAPLAN .EXTENDED .v2 .ssta
       T (Dec 1900) (Mar 2012) RANGE
       T 4 boxAverage
       T 12 STEP
       [T]standardize
       [X Y][T]svd
       ev 2 RANGE
       .Ts
       T 2 index .T replaceGRID
       [T]correlate
      :a
    X Y fig: lightgrey mask fillby black thinnish solid countries_gaz black thinnish solid lakes black thinnish solid states :fig
       X -130 -102 plotrange
       Y 30 50 plotrange