input tree x y x**2 y**2 d dih;
datalines;
205 0 1.248549323 0 1.558875412 0 20.22649903
205 0.118343195 0.989361702 0.014005112 0.978836578 16.2 16.02765957
205 0.236686391 0.879110251 0.056020447 0.772834834 16.2 14.24158607
205 0.355029586 0.819632495 0.126046007 0.671797427 16.2 13.27804642
205 0.473372781 0.764023211 0.22408179 0.583731467 16.2 12.37717602
205 0.591715976 0.599129594 0.350127797 0.35895627 16.2 9.70589942
205 0.710059172 0.482591876 0.504184027 0.232894919 16.2 7.817988395
205 0.828402367 0.275628627 0.686250481 0.07597114 16.2 4.465183752
206 0 1.275650118 0 1.627283224 0 20.66553191
206 0.110497238 0.974468085 0.01220964 0.949588049 16.2 15.78638298
206 0.220994475 0.937588652 0.048838558 0.879072481 16.2 15.18893617
206 0.331491713 0.856737589 0.109886756 0.733999296 16.2 13.87914894
206 0.44198895 0.812765957 0.195354232 0.660588502 16.2 13.16680851
206 0.552486188 0.639243499 0.305240988 0.408632251 16.2 10.35574468
206 0.662983425 0.501654846 0.439547022 0.251657585 16.2 8.126808511
206 0.773480663 0.364066194 0.598272336 0.132544194 16.2 5.89787234
206 0.883977901 0.192907801 0.781416929 0.03721342 16.2 3.125106383
207 0 1.223638614 0 1.497291457 0 19.82294554
207 0.113636364 0.926278878 0.012913223 0.85799256 16.2 15.00571782
207 0.227272727 0.910148515 0.051652893 0.828370319 16.2 14.74440594
207 0.340909091 0.818110561 0.116219008 0.66930489 16.2 13.25339109
207 0.454545455 0.718110561 0.20661157 0.515682778 16.2 11.63339109
207 0.568181818 0.603052805 0.322830579 0.363672686 16.2 9.769455446
207 0.681818182 0.49129538 0.464876033 0.24137115 16.2 7.958985149
207 0.795454545 0.348308581 0.632747934 0.121318867 16.2 5.64259901
207 0.909090909 0.171575908 0.826446281 0.029438292 16.2 2.779529703
208 0 1.257625272 0 1.581621326 0 20.37352941
208 0.104712042 0.972222222 0.010964612 0.945216049 16.2 15.75
208 0.209424084 0.907407407 0.043858447 0.823388203 16.2 14.7
208 0.314136126 0.85620915 0.098681505 0.733094109 16.2 13.87058824
208 0.418848168 0.794117647 0.175433787 0.630622837 16.2 12.86470588
208 0.523560209 0.693899782 0.274115293 0.481496908 16.2 11.24117647
208 0.628272251 0.587145969 0.394726022 0.344740389 16.2 9.511764706
208 0.732984293 0.461873638 0.537265974 0.213327258 16.2 7.482352941
208 0.837696335 0.293572985 0.70173515 0.086185097 16.2 4.755882353
209 0 1.282088123 0 1.643749954 0 20.76982759
209 0.096153846 0.993773946 0.009245562 0.987586656 16.2 16.09913793
209 0.192307692 0.943965517 0.036982249 0.891070898 16.2 15.29224138
209 0.288461538 0.897509579 0.083210059 0.805523444 16.2 14.53965517
209 0.384615385 0.795019157 0.147928994 0.63205546 16.2 12.87931034
209 0.480769231 0.755747126 0.231139053 0.571153719 16.2 12.24310345
209 0.576923077 0.621168582 0.332840237 0.385850408 16.2 10.06293103
209 0.673076923 0.525862069 0.453032544 0.276530916 16.2 8.518965517
209 0.769230769 0.341954023 0.591715976 0.116932554 16.2 5.539655172
209 0.865384615 0.198754789 0.748890533 0.039503466 16.2 3.219827586
210 0 1.36637931 0 1.86699242 0 22.13534483
210 0.111982083 0.954980843 0.012539987 0.91198841 16.2 15.47068966
210 0.223964166 0.932950192 0.050159948 0.87039606 16.2 15.1137931
210 0.335946249 0.836206897 0.112859882 0.699241974 16.2 13.54655172
210 0.447928331 0.685823755 0.20063979 0.470354223 16.2 11.11034483
210 0.559910414 0.60440613 0.313499672 0.36530677 16.2 9.79137931
210 0.671892497 0.470785441 0.451439528 0.221638931 16.2 7.626724138
210 0.78387458 0.311302682 0.614459357 0.09690936 16.2 5.043103448
210 0.895856663 0.159482759 0.802559161 0.02543475 16.2 2.58362069
211 0 1.167044939 0 1.361993889 0 18.90612801
211 0.11148272 0.950522015 0.012428397 0.903492102 16.2 15.39845665
211 0.22296544 0.940535633 0.049713588 0.884607277 16.2 15.23667726
211 0.334448161 0.780299591 0.111855572 0.608867452 16.2 12.64085338
211 0.445930881 0.778483886 0.19885435 0.60603716 16.2 12.61143895
211 0.557413601 0.637766682 0.310709922 0.40674634 16.2 10.33182025
211 0.668896321 0.526100772 0.447422288 0.276782022 16.2 8.522832501
211 0.780379041 0.30549251 0.608991448 0.093325674 16.2 4.948978665
212 0 1.272964509 0 1.620438642 0 20.62202505
212 0.10178117 0.970250522 0.010359407 0.941386075 16.2 15.71805846
212 0.203562341 0.969728601 0.041437627 0.94037356 16.2 15.70960334
212 0.305343511 0.842379958 0.09323466 0.709603994 16.2 13.64655532
212 0.407124682 0.788100209 0.165750507 0.621101939 16.2 12.76722338
212 0.508905852 0.721816284 0.258985167 0.521018748 16.2 11.6934238
212 0.610687023 0.613778706 0.37293864 0.376724299 16.2 9.943215031
212 0.712468193 0.481732777 0.507610927 0.232066468 16.2 7.804070981
212 0.814249364 0.324112735 0.663002027 0.105049065 16.2 5.250626305
213 0 1.188967777 0 1.413644375 0 19.26127799
213 0.111049417 0.992900055 0.012331973 0.985850518 16.2 16.08498088
213 0.222098834 0.86127799 0.049327892 0.741799776 16.2 13.95270344
213 0.333148251 0.805024577 0.110987757 0.648064569 16.2 13.04139814
213 0.444197668 0.683233206 0.197311568 0.466807614 16.2 11.06837794
213 0.555247085 0.602949208 0.308299325 0.363547748 16.2 9.767777171
213 0.666296502 0.50791917 0.443951029 0.257981883 16.2 8.228290552
213 0.777345919 0.352266521 0.604266678 0.124091702 16.2 5.706717641
213 0.888395336 0.219006008 0.789246273 0.047963631 16.2 3.547897324
;
run;
PROC SORT DATA=ALL;
BY tree;
RUN;
PROC SGPLOT DATA=ALL NOAUTOLEGEND;
SERIES X=相对树高 Y=相对直径 / GROUP=tree MARKERS
MARKERATTRS=(SYMBOL=CIRCLEFILLED COLOR=BLACK)
LINEATTRS=(PATTERN=1 COLOR=BLACK);
RUN;
PROC SGPLOT DATA=ALL NOAUTOLEGEND;
SERIES X=相对树高 Y=相对直径 / GROUP=tree MARKERS
MARKERATTRS=(SYMBOL=CIRCLEFILLED COLOR=BLACK)
LINEATTRS=(PATTERN=1 COLOR=BLACK);
RUN;
PROC NLIN DATA=ALL;
PARMS a=1.2 b=-2.3 c=1.01;
MODEL y**2=a+b*x+c*y**2 ;
RUN;
PROC NLIN DATA=ALL;
PARMS b1=2.4 b2=1 b3=4 b4=0.6 a1=0.04 a2=0.69 i1=0.15 i2=0.8;
MODEL y=b1*(x-1)+b2*(x**2-1)+b3*(a1-x)**2*i1+b4*(a2-x)**2*i2 ;
RUN;
PROC NLIN DATA=ALL;
PARMS b1=2.4 b2=1 b3=4 b4=-0.6 b5=1;
MODEL y=(b1*(d**b2))*((x-1)**(b3*(x**2)+b4*x+b5));
RUN;



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