📄 errata
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I had promised that the *.dat files would never change, but I learned laterthat miles.dat as originally distributed used the wrong two-letter statecodes for Nebraska and Saskatchewan. This was politically incorrect.I decided to change to the correct codes, since this won't affect anyof the data that's critical for the graph structure. Please replace yourcopies of miles.dat (and cities.texmap) if they are dated earlier than 1995.----------------------------------------Here is a list of all changes known to date that will appear in the fourthprinting of The Stanford GraphBase book. Most of these corrections werealready made in the second printing, and almost all were in the third. If youknow of an error not listed here, chances are good that you can earn a rewardby reporting it to sgb@cs.stanford.edu. [Note that comparison between pointersfrom differently calloc'd regions of memory is not considered erroneous; seethe README file.] Many thanks to the readers who reported these glitches.Page 1, line 17: should say The eleven data files *.dat occupy 355,155 bytesPage 10, line 9: should say John Lewis RogetPage 14, line 6: change "it is" to "is"Page 20, line 1: change "&" to "\&"Page 21, lines 16, 15, 2, and 1 from the bottom: change 11519, 17090, 14650, 23098 to 11736, 17770, 14919, 23901, respectivelyPages 22 and 24: the illustrations are too low on the pagePage 22: should say Regina, SK and Scottsbluff, NEPage 23, lines 6 and 7: change 91256 to 91953 and 274127 to 290169Page 26, insert at beginning of line 17: (In rare cases, the triangleinequality will fail.)Page 26, line 17: $2^14$ is, of course, 16384Page 28, line 2: should say "is much more difficult than the"Pages 29 and 30: change "dominos" to "dominoes" (7 times)Page 33, line 14: insert thin space before "..."Page 34: remove extra comma in the caption to Figure 11Page 34, caption to Figure 12: change "(28,4,8,4,0,0)" to "(8,4,8,4,0,0,0)"Page 40: remove the first "poset," on line 19Page 43, line 5: change "1982 and 1984" to "1984 and 1986"Page 43, line 7: change "1988" to "1989"Page 45, line 12: change "under under" to "under"Page 45, line 23: change "279" to "239"Page 46, line 4 from the bottom: industry $j$, not industry $k$Page 52, line 5: change "the vertices" to "two vertices"Page 58: numbered line 61 should end "+The+Stanford+GraphBase+"Page 58: numbered lines 69 and 70 should end with double quotesPage 59: insert change "test" to "./test" on numbered lines 87, 88, 89, 93Page 60: change "-o foo" to "-o foo foo.c" in both displayed command linesPage 60, line 7 from bottom: change "/usr" to "`/usr"Page 61, line 5 from bottom: change "CHANGEFILE" to "CHANGEFILES"Page 62: line 25: change "lines 92--96" to "lines 73--77"Page 63, line 15: change "gb_graph.o" to "gb_graph.o,"Page 75: remove semicolon at end of line 2Page 78, line 8: The accent in K\"onig should actually be the longHungarian accent, K\H{o}nig. (Also on line 6 from the bottom,and on page 79 lines 1 and 11, and in the index on page 573.)Page 78: the long-double-dash notation used on lines 15 and following ischanged to a heavy barPage 78: in display (*) and the following lines, use notation like $r^{(0)$and $c^{(1)}$ instead of $r_0$ and $c_1$Page 78, line 7 from bottom: change "matrix" to "matrix, of size $n\times n$"Page 81, line 14: change "row $l$" to "column $l$"Page 90, lines -10 and -9: remove the semicolonsPage 99, line 6: change "x --- y" to "y --- z"Page 121, line 4 should say: "assume that |BUF_SIZE| is rather large,but in cases of doubt they ensure that |BUF_SIZE| will never be exceeded."Page 124, line 11 from bottom: change "x_k+\delta_k" to "x_d+\delta_d"Page 138, line 15 should reverse the order of the tests: if (ss<UL_BITS && (size_bits&(((unsigned long)1)<<ss))) {Page 156, lines 16 and 17 should be replaced by the following:removed. Regardless of the value of |copy|, information that mighthave been present in the utility fields will not be copied, and arclengths will all be set to 1.Page 160, line -5: change "panic(no_room+1)" to "panic(missing_operand)"Page 163, line 19: change "panic(no_room+1)" to "panic(missing_operand)"Page 168, line 9: change "panic(no_room+1)" to "panic(missing_operand)"Page 182, line -9: change "their weights" to "their statistics"Page 184, line -6: change "their weights" to "their statistics"Page 184, line -2: change "check sum" to "checksum"Page 194, line 15: change "awhile" to "a while"Page 194, line -7: change "hh==NULL" to "!hh"(i.e., change $hh\equiv\Lambda$ to $\lnot hh$)Page 194, line 23: change "long dummy(v)" to "static long dummy(v)"Page 198, line 17: change "Vertex head[128]" to "static Vertex head[128]"Page 200, line 9: change "long master_key" to "static long master_key"Page 213, line 5: change "obtaining" to "obtained"Page 216, lines 8 and 9: The period length of the generated numbers is$2^{85}-2^{30}$.Page 217, line 3: the recurrence should be $a_n=(a_{n-55}-a_{n-24})\bmod m$Page 217, insert a new paragraph at the beginning of section 6:The numbers generated by |gb_next_rand()| seem to be satisfactory for mostpurposes, but they do fail a stringent test called the ``birthday spacingstest,'' devised by George Marsaglia. [See, for example, {\sl Statistics andProbability Letters\/ \bf8} (1990), 35--39.] One way to get numbers thatpass the birthday test is to discard half of the values, for exampleby changing `|gb_flip_cycle()|' to `|gb_flip_cycle(),gb_flip_cycle()|'in the definition of |gb_next_rand()|. Users who wish to make such a changeshould define their own substitute macro.Page 218, line 5: change "mod" to "divided by"Page 222, line 10 of section 2: change "copy" to "complement"Page 282, after #include <stdio.h>: also say #include <stdlib.h> (twice)Page 287, insert a new paragraph after line 4, to wit: {\sl Important Note:\/}Programs of the Stanford GraphBase implicitly assume that all memory allocatedby |calloc| comes from a single underlying memory array. Therefore pointervalues are compared to each other in many places, even when the objectspointed to have been allocated at different times. Strictly speaking, thisliberal use of pointer comparisons fails to conform to the restrictions ofANSI Standard \CEE/, when the comparison involves a less-than or greater-thenrelation. Users whose system supports only the strict standard will need tomake several dozen changes.Page 288, section 18, line 11: replace "g->uu.I++;" by the code { g->uu.I++; printf("."); fflush(stdout); }and make entries for fflush and stdout in the mini-index on page 289Page 303, line 2: change "check sum" to "checksum"Page 304, line 8: change "is none" to "if none"Page 304, line 20: change "81" to "sizeof(buffer)"Page 305, line 15: change 100 to |unexpected_char|Page 306, bottom line: change "icode[*p]" to "imap_ord(*p)"Page 308, replacement for 3rd line from bottom: icode[0]=d; /* make sure '\0' is a nondigit */ if (imap_ord(*cur_pos)<d) return icode[*cur_pos++];Page 309, line 5: change "icode[*cur_pos]" to "imap_ord(*cur_pos)"Page 312, line 12: change "#endif DATA_DIRECTORY" to "#endif"Page 312, line 18: change "19" to "sizeof(file_name)-1"Page 312, line 9 from the bottom: change "5-letter" to "five-letter"Page 312, bottom line: the comma should be in typewriter typePage 320, line 14: we want to compute $\langle 2a_0, a_0+a_1, 2a_1 \rangle$Page 323, line 16: change "check sum" to "checksum"Page 332, line -7: change "decidegrees" to "centidegrees"Page 330, line 17: change "util_types[6]" to "util_types[7]"Page 335, section 10: the variables should all be declared static(this affects the mini-indexes on pages 337, 339, 341)Page 336, lines 22 and 23: change "SA" to "SK" and delete the sentenceabout New Brunswick vs Nebraska (Nebraska changed from NB to NE long ago!)Page 346, line 14 (display): insert ")" before final commaPage 346, line 5 of section 9: the sentence should begin "The utilityfield |z_coord| must contain a unique ID number"Page 348, line 2, change "void new_euclid_edge(u,v)" to "static void new_euclid_edge(u,v)"Similarly, the declarations of int_sqrt (page 349), sign_test (page 350), ccw (page 352), incircle (page 353), ff, gg, hh, jj (page 355), flip (page 363), and new_mile_edge (page 365) should all be prefixed by "static"Page 352, line 7, change "that that" to "that"Page 354, section 23. The displayed formulas should define functionsff, gg, hh, and jj (not f, g, h, and j)Page 366, section 2, line 6: should say {1,3,4,9,10,12}Page 374: this commentary was not precisely correct; the revised versioncan be found in file gb_raman.w in the current sourcesPage 376, line 12: change "$p-a^2-2c^2$" to "$p-a^2-b^2-2c^2$"Page 385, new paragraph to follow line 4: Warning: Users need to initialize the random number generator before calling |random_graph|, or any other GraphBase procedure that consumes random numbers. (See GB_FLIP.)Page 386, line 21: change (25,m,...) to (31,m,...)Page 387, line 14: change "of of" to "of"Page 388, line 17: change "max_len-min_len" to "max_len-min_len+1"Page 400, section 7: the variables should both be declared static(this affects the mini-index on page 403)Page 410, replacement for the four last lines: 13. define buffer (&item_buf[MAX_SV_STRING+3]) /* the last 81 chars of |item_buf| */ <Private variables 8>= static char item_buf[MAX_SV_STRING+3+81]; /* an item to be output */Page 413, line 10: change "output; in" to "output; the value $-3$ will bereturned if memory is exhausted. In"Page 414, line 5: remove the semicolonPage 414, swap lines 7--8 with with lines 9--10Page 414: last line should end ", or if comparisons between pointers areundefined."Page 415: new line of code to follow line 12: if (blocks==NULL) return -3; /* out of memory */Page 426, line 13: change "common words" to "common five-letter words"Page 430: the bottom few lines should move to page 431Page 436, section 17: node_blocks should be declared static(this affects the mini-indexes on pages 433 and 439)Page 442, line 23: change "3,675,808" to "3,674,808"Page 444, section 6, line 4: insert "n-vertex" before "regular"Page 444, section 7, line 3: should be superscript g, not subscriptPage 445, line -6: change "4*q*2" to "4*q*q"Pages 452 and 453: change "rand" to "randm" (six times)Page 456, lines 8 and 9 of section 18: change "u->arcs->len" to "(u->arcs-1)->len" and vice versaPage 461, line 16: remove the semicolonPage 466, line 12 from the bottom: remove the semicolonPage 481, line 12: change "u->parent" to "o,u->parent"Page 490, line 19: remove the semicolonPage 494, line 5 of section 65: change "t->rsib" to "o,t->rsib"Page 495, line 5: change "o,k" to "oo,k"Page 497, line 2: change "respect" to "respect to"Page 497, line 18: change "1000" to "100"Page 497, lines 16, 17, 29, 30: change "11519" to "11736", "17090" to "17770","58544" to "59050", and "165749" to "175519" Page 512, section 2, line 9: remove the semicolonPage 537: add "GB_GRAPH 18," to the index listings for fflushPage 543: section numbers in the index listings for panic_code should notbe underlined except in GB_GRAPHPage 545: add "GB_GRAPH 18," to the index listings for stdoutPage 547: add section 10 to the index listings for unexpected_char in GB_IOPage 555: move the prototype for gb_number to page 554, where it belongsin alphabetic orderPage 557: "all_parts(10)" should be "all_parts(10,0)"Page 558: "all_perms(5)" should be "all_perms(5,0)"Page 559: "book("homer",280,0,1,0,0,1,1,0)" should be "book("homer",280,0,0,0,1,1,0)"Page 561: "all_perms(7)" should be "all_perms(7,0)"Page 561, last two lines: change "multiple edges" to "multiple arcs"Page 562, lines 7 and 11: change "multiple edges" to "multiple arcs"Page 568, line 5: change ". 15" to ", 15"Pages 568 and 569: insert thin space after the comma when giving issuenumbers, in references [5], [9], [15], [16], [23], [30], [31].Page 572: "Jarn{\'\i}, k" should be "Jarn{\'\i}k"Page 573: "K\"onig" should be "K\H{o}nig"Page 573: should say "literate programming" not "literate programmming"Page 573, Marsaglia, George, 217Page 574: permutations, random, 104Page 574: should say Roget, John LewisPage 575: should say "Tolsto\u\i, Lev Nikolaevich"Page 575: add page 26 under triangle inequalityPage 575: Voronoi's correct name is "Vorono\u\i, Georgi\u\i\ Feodos'evich"Page 575: Walker's full name is "Walker, Alistair John"Refinements to spacing between lines, relevant to section names like<Local variables>, have also been made on pages 75, 124, 131, 137, 140,146, 150, 156, 158, 160, 163, 168, 174, 182, 204, 225, 318, 324, 329,334, 367, 399, 414, 433, 466, 490.⌨️ 快捷键说明
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