Description Usage Arguments Value Author(s) See Also Examples
Calculates the Standardized Precipitation Index (SPI) on a daily or monthly precipitation serie.
1 | spi(object, period = 3, distribution = "Gamma")
|
object |
a daily or monthly precipitation serie. |
period |
the number of months to be aggregated in the calculation of the standardized precipitation index. (Default value: 3) |
distribution |
it has no effect yet. (Default value: "Gamma") |
A data.frame (precintcon.spi) containing the following variables:
year
is the year.
month
is the month.
spi
is the standardized precipitation index.
Lucas Venezian Povoa lucasvenez@gmail.com
1 2 3 4 5 6 7 |
Loading required package: ggplot2
Loading required package: scales
year month spi
3 1950 3 -1.715216076
4 1950 4 -0.006591791
5 1950 5 0.354215681
6 1950 6 1.313418282
7 1950 7 0.348769746
8 1950 8 -0.336807606
9 1950 9 -1.113102453
10 1950 10 -0.970787476
11 1950 11 -0.119738117
12 1950 12 -0.934152338
13 1951 1 0.273755343
14 1951 2 0.347032810
15 1951 3 0.684998486
16 1951 4 0.530933371
17 1951 5 -0.005280760
18 1951 6 0.190188268
19 1951 7 -0.438535063
20 1951 8 1.072410355
21 1951 9 0.825555839
22 1951 10 1.810567703
23 1951 11 0.987477957
24 1951 12 1.249176927
25 1952 1 -0.042259689
26 1952 2 -0.369957569
27 1952 3 0.458212890
28 1952 4 1.304453686
29 1952 5 1.050344572
30 1952 6 0.134645121
31 1952 7 -0.766530085
32 1952 8 -1.266492498
33 1952 9 -0.713102842
34 1952 10 -0.840899267
35 1952 11 -0.719132656
36 1952 12 -0.650596869
37 1953 1 -0.018696741
38 1953 2 0.393584188
39 1953 3 0.560686419
40 1953 4 0.239342313
41 1953 5 -0.078781417
42 1953 6 -0.095806067
43 1953 7 0.112479970
44 1953 8 -0.072686600
45 1953 9 -0.465116948
46 1953 10 -1.038526785
47 1953 11 -1.134270508
48 1953 12 0.111698961
49 1954 1 0.380109318
50 1954 2 -0.505144392
51 1954 3 -2.145835485
52 1954 4 -2.065733393
53 1954 5 -2.034160050
54 1954 6 -2.093869875
55 1954 7 -1.349284645
56 1954 8 -0.890497479
57 1954 9 -0.556971500
58 1954 10 -1.570185026
59 1954 11 -1.425464598
60 1954 12 -1.062083995
61 1955 1 -0.499916121
62 1955 2 0.178972529
63 1955 3 -0.092160754
64 1955 4 -0.859837188
65 1955 5 -0.584084588
66 1955 6 -0.622941360
67 1955 7 0.415489437
68 1955 8 0.795284404
69 1955 9 1.466845402
70 1955 10 1.141628527
71 1955 11 0.765529130
72 1955 12 -1.023021647
73 1956 1 -1.124766375
74 1956 2 -0.474553690
75 1956 3 -0.268739616
76 1956 4 -0.946112293
77 1956 5 -0.649648996
78 1956 6 -1.091469926
79 1956 7 0.461939136
80 1956 8 0.664178210
81 1956 9 0.725977919
82 1956 10 -0.856753197
83 1956 11 -1.263719269
84 1956 12 -0.177368335
85 1957 1 0.316675565
86 1957 2 0.027993723
87 1957 3 -0.174044569
88 1957 4 1.520179140
89 1957 5 2.422611749
90 1957 6 2.318278053
91 1957 7 1.398604261
92 1957 8 -0.206845197
93 1957 9 -0.295242566
94 1957 10 0.838050523
95 1957 11 0.496023289
96 1957 12 0.674610064
97 1958 1 -0.833405558
98 1958 2 0.178972529
99 1958 3 0.789580188
100 1958 4 0.498042030
101 1958 5 0.958867574
102 1958 6 0.817994629
103 1958 7 1.317115565
104 1958 8 0.548052031
105 1958 9 0.791395862
106 1958 10 -0.202348183
107 1958 11 -0.185472374
108 1958 12 -0.573237070
109 1959 1 0.748772633
110 1959 2 1.589380335
111 1959 3 2.245519551
112 1959 4 1.282335827
113 1959 5 0.908774069
114 1959 6 -0.230985967
115 1959 7 -0.578153162
116 1959 8 -2.173738514
117 1959 9 -0.781979204
118 1959 10 0.591462945
119 1959 11 1.209044771
120 1959 12 0.637837783
121 1960 1 -0.611659304
122 1960 2 1.142966581
123 1960 3 0.875938284
124 1960 4 1.055206992
125 1960 5 0.198141561
126 1960 6 -0.073011899
127 1960 7 -0.782718282
128 1960 8 -1.723451265
129 1960 9 -1.644828608
130 1960 10 -0.296360684
131 1960 11 0.357099850
132 1960 12 1.510177056
133 1961 1 0.175250932
134 1961 2 0.682083268
135 1961 3 0.813320992
136 1961 4 0.511228980
137 1961 5 0.965975133
138 1961 6 0.286599851
139 1961 7 0.407696405
140 1961 8 -0.456542926
141 1961 9 1.256788178
142 1961 10 1.473921977
143 1961 11 2.075065652
144 1961 12 -0.313256771
145 1962 1 0.691405802
146 1962 2 1.133514402
147 1962 3 0.535328607
148 1962 4 -0.675594245
149 1962 5 -1.625605770
150 1962 6 -1.128611718
151 1962 7 -1.585068702
152 1962 8 -1.316559667
153 1962 9 -2.226074735
154 1962 10 -2.448734783
155 1962 11 -2.137411297
156 1962 12 -1.723041291
157 1963 1 -0.432135354
158 1963 2 -0.830772565
159 1963 3 0.026904725
160 1963 4 -1.734899179
161 1963 5 -1.893427221
162 1963 6 -0.644307132
163 1963 7 -0.467980297
164 1963 8 0.747113476
165 1963 9 -0.001926101
166 1963 10 0.370884437
167 1963 11 -0.739003694
168 1963 12 -1.155681234
169 1964 1 -0.927157908
170 1964 2 0.203492391
171 1964 3 0.343926548
172 1964 4 0.125433073
173 1964 5 -0.051032247
174 1964 6 -0.487263929
175 1964 7 -0.859333471
176 1964 8 -1.891144836
177 1964 9 -1.988395533
178 1964 10 -2.185818707
179 1964 11 -1.337111350
180 1964 12 -0.909317534
181 1965 1 0.411413409
182 1965 2 1.124039431
183 1965 3 0.990751888
184 1965 4 0.015709428
185 1965 5 -0.594919147
186 1965 6 0.574351274
187 1965 7 2.167042418
188 1965 8 2.273373218
189 1965 9 2.042713936
190 1965 10 0.375954412
191 1965 11 0.399335079
192 1965 12 -1.062083995
193 1966 1 -0.975240957
194 1966 2 0.551819570
195 1966 3 -0.433154508
196 1966 4 -0.341979199
197 1966 5 -1.901994972
198 1966 6 -1.288391573
199 1966 7 -1.663312079
200 1966 8 -0.158270621
201 1966 9 -0.035815446
202 1966 10 0.416225863
203 1966 11 -0.347356026
204 1966 12 -0.921705035
205 1967 1 -0.757581786
206 1967 2 -0.340747223
207 1967 3 -0.300942234
208 1967 4 1.066832217
209 1967 5 1.568316098
210 1967 6 2.547144836
211 1967 7 2.256680906
212 1967 8 1.464774616
213 1967 9 0.166903377
214 1967 10 -0.522640567
215 1967 11 -0.087377079
216 1967 12 0.696492315
217 1968 1 0.710624512
218 1968 2 0.766405931
219 1968 3 -0.215784360
220 1968 4 0.343370401
221 1968 5 -0.660708618
222 1968 6 -1.042626110
223 1968 7 -1.841971308
224 1968 8 -0.226488520
225 1968 9 0.064772689
226 1968 10 0.262487913
227 1968 11 -0.699396554
228 1968 12 -0.343225069
229 1969 1 -0.669154750
230 1969 2 -0.796433432
231 1969 3 -0.666923448
232 1969 4 -0.509158158
233 1969 5 1.260902897
234 1969 6 1.730740750
235 1969 7 1.766182002
236 1969 8 0.325148919
237 1969 9 -0.026093273
238 1969 10 1.466516377
239 1969 11 2.116850037
240 1969 12 1.881201234
241 1970 1 -1.229280305
242 1970 2 -2.366982824
243 1970 3 -0.987584451
244 1970 4 -1.004888935
245 1970 5 -1.271603707
246 1970 6 -0.082112016
247 1970 7 0.129230456
248 1970 8 0.508522247
249 1970 9 0.166903377
250 1970 10 0.272974284
251 1970 11 1.128817488
252 1970 12 -0.158462352
253 1971 1 -0.339713274
254 1971 2 -0.614862566
255 1971 3 -0.715927850
256 1971 4 -0.158788167
257 1971 5 -0.716593397
258 1971 6 -1.073063974
259 1971 7 -1.677772390
260 1971 8 -1.496081410
261 1971 9 0.265963613
262 1971 10 0.401183662
263 1971 11 0.441085818
264 1971 12 -1.812012735
265 1972 1 -1.761182293
266 1972 2 -0.900787841
267 1972 3 -1.198912012
268 1972 4 0.660036410
269 1972 5 -0.364534950
270 1972 6 0.551129258
271 1972 7 -0.864875158
272 1972 8 0.602694275
273 1972 9 0.484952436
274 1972 10 1.064002347
275 1972 11 1.151900679
276 1972 12 0.703756690
277 1973 1 1.661344875
278 1973 2 0.617538680
279 1973 3 0.805423353
280 1973 4 1.359301340
281 1973 5 1.879694019
282 1973 6 1.277448152
283 1973 7 0.744642579
284 1973 8 -0.440655252
285 1973 9 0.948152140
286 1973 10 0.624471458
287 1973 11 0.896525549
288 1973 12 1.323743837
289 1974 1 2.364235445
290 1974 2 2.707915014
291 1974 3 0.757699936
292 1974 4 0.634522755
293 1974 5 -0.825596966
294 1974 6 -0.617621096
295 1974 7 -0.676256636
296 1974 8 -0.158270621
297 1974 9 -0.437020398
298 1974 10 -0.347881292
299 1974 11 0.623321699
300 1974 12 0.570667387
301 1975 1 -0.405442213
302 1975 2 -1.201110090
303 1975 3 -0.559503660
304 1975 4 -0.648785311
305 1975 5 -0.064878514
306 1975 6 0.185943167
307 1975 7 0.730227498
308 1975 8 0.831931953
309 1975 9 0.318780381
310 1975 10 -0.536583566
311 1975 11 -0.356114787
312 1975 12 0.271734300
313 1976 1 0.672088968
314 1976 2 -0.647007013
315 1976 3 -0.247451558
316 1976 4 -0.269198410
317 1976 5 -0.660708618
318 1976 6 -1.268768732
319 1976 7 -0.745068134
320 1976 8 0.261893402
321 1976 9 0.980894761
322 1976 10 0.942173309
323 1976 11 0.212630338
324 1976 12 -0.971860496
325 1977 1 -2.066781642
326 1977 2 -1.888315782
327 1977 3 -0.703600936
328 1977 4 0.103721147
329 1977 5 -0.796539942
330 1977 6 -1.109985285
331 1977 7 -0.713132742
332 1977 8 0.069550656
333 1977 9 -0.119768377
334 1977 10 -1.321991460
335 1977 11 -1.740001905
336 1977 12 -1.399243126
337 1978 1 -1.510626152
338 1978 2 -1.942465434
339 1978 3 -0.778344769
340 1978 4 -0.261200633
341 1978 5 0.460234330
342 1978 6 0.352327879
343 1978 7 -0.299624699
344 1978 8 -1.749141000
345 1978 9 -2.657441470
346 1978 10 -1.135052993
347 1978 11 -0.729051163
348 1978 12 0.368993686
349 1979 1 -0.300940895
350 1979 2 -0.089998891
351 1979 3 -0.311749749
352 1979 4 -0.325679405
353 1979 5 0.395334653
354 1979 6 0.696060682
355 1979 7 0.368506752
356 1979 8 1.551291141
357 1979 9 1.098569191
358 1979 10 1.773001661
359 1979 11 0.335796144
360 1979 12 1.236610651
361 1980 1 1.395097878
362 1980 2 0.595765508
363 1980 3 -0.072011175
364 1980 4 0.451563440
365 1980 5 0.488292851
366 1980 6 -0.118747581
367 1980 7 -0.037197609
368 1980 8 -0.082081945
369 1980 9 0.400749358
370 1980 10 -0.650963292
371 1980 11 -1.438340589
372 1980 12 -1.793919884
373 1981 1 -1.211572122
374 1981 2 -1.519571909
375 1981 3 0.543800147
376 1981 4 0.096458342
377 1981 5 0.728514514
378 1981 6 -0.100382516
379 1981 7 -0.243714838
380 1981 8 -1.196597119
381 1981 9 -1.113102453
382 1981 10 -0.710164388
383 1981 11 -1.227782600
384 1981 12 -0.445453511
385 1982 1 -0.654674861
386 1982 2 -0.865552505
387 1982 3 -2.546604111
388 1982 4 -3.554355212
389 1982 5 -0.633131307
390 1982 6 0.198664915
391 1982 7 0.340848049
392 1982 8 -0.241302749
393 1982 9 -0.448225369
394 1982 10 0.355625678
395 1982 11 0.378278899
396 1982 12 1.433039669
397 1983 1 1.058695994
398 1983 2 1.018267526
399 1983 3 1.879089726
400 1983 4 1.915462372
401 1983 5 1.800805114
402 1983 6 1.069186450
403 1983 7 0.847724566
404 1983 8 0.456489945
405 1983 9 -0.487798438
406 1983 10 -0.921241696
407 1983 11 0.227342595
408 1983 12 1.009821581
409 1984 1 1.459240612
410 1984 2 -0.036998282
411 1984 3 -0.132841877
412 1984 4 0.634522755
413 1984 5 -0.493431194
414 1984 6 -0.628270062
415 1984 7 -0.887136651
416 1984 8 0.713404483
417 1984 9 0.635524410
418 1984 10 1.651106019
419 1984 11 0.933158588
420 1984 12 1.360507988
421 1985 1 -0.640266236
422 1985 2 0.104329787
423 1985 3 -0.366350845
424 1985 4 0.281265076
425 1985 5 -0.304408199
426 1985 6 -0.100382516
427 1985 7 0.276911112
428 1985 8 0.266145478
429 1985 9 0.844396050
430 1985 10 -0.006266670
431 1985 11 0.987477957
432 1985 12 0.255247100
433 1986 1 0.197378568
434 1986 2 -0.157577899
435 1986 3 -1.198912012
436 1986 4 0.125433073
437 1986 5 -0.462030838
438 1986 6 -0.307850054
439 1986 7 -0.864875158
440 1986 8 -0.811496513
441 1986 9 -0.945567082
442 1986 10 -0.387188469
443 1986 11 0.335796144
444 1986 12 0.681919081
445 1987 1 0.186332074
446 1987 2 0.660695594
447 1987 3 0.813320992
448 1987 4 0.059950835
449 1987 5 0.717215994
450 1987 6 1.336162448
451 1987 7 1.146394183
452 1987 8 0.594937225
453 1987 9 -0.448225369
454 1987 10 0.299037285
455 1987 11 0.516415357
456 1987 12 1.336036276
457 1988 1 1.362658872
458 1988 2 0.755970672
459 1988 3 -0.032085243
460 1988 4 -0.803518366
461 1988 5 0.395334653
462 1988 6 0.244967121
463 1988 7 0.744642579
464 1988 8 0.201823753
465 1988 9 0.274824464
466 1988 10 -0.367461864
467 1988 11 -1.387224147
468 1988 12 -0.776805208
469 1989 1 0.777135449
470 1989 2 1.282109750
471 1989 3 0.046347883
472 1989 4 -1.105234013
473 1989 5 0.053329938
474 1989 6 0.519962191
475 1989 7 0.664746936
476 1989 8 0.051530467
477 1989 9 0.069484885
478 1989 10 0.139273473
479 1989 11 -0.278165482
480 1989 12 -0.551528232
481 1990 1 -0.249989505
482 1990 2 0.540748306
483 1990 3 1.632942998
484 1990 4 0.785413519
485 1990 5 0.154841408
486 1990 6 -1.621511006
487 1990 7 -0.243714838
488 1990 8 0.387308848
489 1990 9 1.088021207
490 1990 10 0.553329129
491 1990 11 0.656113329
492 1990 12 0.213669004
493 1991 1 0.442450102
494 1991 2 -0.796433432
495 1991 3 -0.790988560
496 1991 4 -0.578281546
497 1991 5 -0.064878514
498 1991 6 0.400931436
499 1991 7 1.093566073
500 1991 8 1.832718842
501 1991 9 1.614456415
502 1991 10 0.886161290
503 1991 11 0.902654840
504 1991 12 0.949249804
505 1992 1 1.919621551
506 1992 2 -0.240723956
507 1992 3 1.879089726
508 1992 4 0.438189881
509 1992 5 -0.051032247
510 1992 6 -0.994530169
511 1992 7 -0.202355050
512 1992 8 0.717164727
513 1992 9 0.116236184
514 1992 10 -0.328444131
515 1992 11 -0.769068406
516 1992 12 0.271734300
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