croposp [FEATURE]: support exact reproduction of publication example

By setting the seed value for the random number generator explicitly we
can reproduce the random number time series. This lets us exactly
reproduce the value used for the publication on TCCA approximation
errors.

src/ts/croposp/tests/.gitignore

+*.seed

src/ts/croposp/tests/Makefile

@@ -22,10 +22,16 @@
 #
 # run with pairwise noise signal:
 #
-# make all PAIRWISE=yes
+#   make all PAIRWISE=yes
+#
+# run with seed values of publication example
+#
+#   make cleanseed; make all FIXEDSEED=yes
 #
 # REVISIONS and CHANGES 
 #    06/02/2019   V1.0   Thomas Forbriger
+#    18/09/2019   V1.1   provide fixed seed value on request to reproduce
+#                        publication example exactly
 # 
 # ============================================================================
 #
@@ -57,11 +63,15 @@ npsd_compilation.pdf:  $(addprefix SNPSD_,$(addsuffix .pdf,$(CPSD_SET)))
 alldata: cpsd1.bin cpsd2.bin cpsd3.bin cpsd4.bin
 
 .PHONY: clean
-clean: ; 
+clean: cleanseed ; 
 	-find . -name \*.bak | xargs --no-run-if-empty /bin/rm -v
 	-/bin/rm -vf flist *.bin *.o *.xxx *.ps *.pdf *~ 
 	-/bin/rm -vf *.asc
 
+.PHONY: cleanseed
+cleanseed: ; 
+	-/bin/rm -vf *.seed
+
 # ======================================================================
 # create time series
 # ==================
@@ -132,31 +142,28 @@ RNGTYPE=ranlux
 # Choose:
 RNGTYPE=ranlxd2
 
-cpsd1raw.bin:
-	/bin/bash -c 'export GSL_RNG_SEED=$$(date +"%N"); \
-	  export GSL_RNG_TYPE=$(RNGTYPE); \
-	  siggenx 14 $@ $(CPSD_SIGGENOPT); \
-	  echo seed: $$GSL_RNG_SEED > $(patsubst %.bin,%seed.xxx,$@)'
-cpsd2raw.bin:
-	/bin/bash -c 'export GSL_RNG_SEED=$$(date +"%N"); \
-	  export GSL_RNG_TYPE=$(RNGTYPE); \
-	  siggenx 14 $@ $(CPSD_SIGGENOPT); \
-	  echo seed: $$GSL_RNG_SEED > $(patsubst %.bin,%seed.xxx,$@)'
-cpsd3raw.bin:
-	/bin/bash -c 'export GSL_RNG_SEED=$$(date +"%N"); \
-	  export GSL_RNG_TYPE=$(RNGTYPE); \
-	  siggenx 14 $@ $(CPSD_SIGGENOPT); \
-	  echo seed: $$GSL_RNG_SEED > $(patsubst %.bin,%seed.xxx,$@)'
-cpsd4raw.bin:
-	/bin/bash -c 'export GSL_RNG_SEED=$$(date +"%N"); \
+# allow to reproduce publication example exactly
+ifdef FIXEDSEED
+cpsd1raw.seed:  ;printf "%s\n" 686293391 > $@
+cpsd2raw.seed:  ;printf "%s\n" 448546898 > $@
+cpsd3raw.seed:  ;printf "%s\n" 021371780 > $@
+cpsd4raw.seed:  ;printf "%s\n" 559720675 > $@
+cpsdbgraw.seed: ;printf "%s\n" 137374844 > $@
+else
+cpsd1raw.seed:  ;printf "%s\n" $$(date +"%N") > $@
+cpsd2raw.seed:  ;printf "%s\n" $$(date +"%N") > $@
+cpsd3raw.seed:  ;printf "%s\n" $$(date +"%N") > $@
+cpsd4raw.seed:  ;printf "%s\n" $$(date +"%N") > $@
+cpsdbgraw.seed: ;printf "%s\n" $$(date +"%N") > $@
+endif
+
+cpsd1raw.bin cpsd2raw.bin cpsd3raw.bin cpsd4raw.bin cpsdbgraw.bin: \
+  %.bin: %.seed
+	/bin/bash -c 'export GSL_RNG_SEED=$$(cat $<); \
 	  export GSL_RNG_TYPE=$(RNGTYPE); \
 	  siggenx 14 $@ $(CPSD_SIGGENOPT); \
 	  echo seed: $$GSL_RNG_SEED > $(patsubst %.bin,%seed.xxx,$@)'
-# create time series for common noise signal
-cpsdbgraw.bin:
-	/bin/bash -c 'export GSL_RNG_SEED=$$(date +"%N"); \
-	  siggenx 14 $@ $(CPSD_SIGGENOPT); \
-	  echo seed: $$GSL_RNG_SEED > $(patsubst %.bin,%seed.xxx,$@)'
+# time series for common noise signal: cpsdbgraw.bin
 
 # provide a time series plot to confirm incoherence
 rawsig.ps: cpsd1raw.bin cpsd2raw.bin cpsd3raw.bin cpsd4raw.bin cpsdbgraw.bin