wang2vec: move to the right position
diff --git a/word-analogy.c b/word-analogy.c
new file mode 100644
index 0000000..bc78ba7
--- /dev/null
+++ b/word-analogy.c
@@ -0,0 +1,143 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <stdlib.h>
+
+const long long max_size = 2000; // max length of strings
+const long long N = 40; // number of closest words that will be shown
+const long long max_w = 50; // max length of vocabulary entries
+
+int main(int argc, char **argv) {
+ FILE *f;
+ char st1[max_size];
+ char bestw[N][max_size];
+ char file_name[max_size], st[100][max_size];
+ float dist, len, bestd[N], vec[max_size];
+ long long words, size, a, b, c, d, cn, bi[100];
+ float *M;
+ char *vocab;
+ if (argc < 2) {
+ printf("Usage: ./word-analogy <FILE>\nwhere FILE contains word projections in the BINARY FORMAT\n");
+ return 0;
+ }
+ strcpy(file_name, argv[1]);
+ f = fopen(file_name, "rb");
+ if (f == NULL) {
+ printf("Input file not found\n");
+ return -1;
+ }
+ fscanf(f, "%lld", &words);
+ fscanf(f, "%lld", &size);
+ vocab = (char *)malloc((long long)words * max_w * sizeof(char));
+ M = (float *)malloc((long long)words * (long long)size * sizeof(float));
+ if (M == NULL) {
+ printf("Cannot allocate memory: %lld MB %lld %lld\n", (long long)words * size * sizeof(float) / 1048576, words, size);
+ return -1;
+ }
+ for (b = 0; b < words; b++) {
+ a = 0;
+ while (1) {
+ vocab[b * max_w + a] = fgetc(f);
+ if (feof(f) || (vocab[b * max_w + a] == ' ')) break;
+ if ((a < max_w) && (vocab[b * max_w + a] != '\n')) a++;
+ }
+ vocab[b * max_w + a] = 0;
+ for (a = 0; a < size; a++) fread(&M[a + b * size], sizeof(float), 1, f);
+ len = 0;
+ for (a = 0; a < size; a++) len += M[a + b * size] * M[a + b * size];
+ len = sqrt(len);
+ for (a = 0; a < size; a++) M[a + b * size] /= len;
+ }
+ fclose(f);
+ while (1) {
+ for (a = 0; a < N; a++) bestd[a] = 0;
+ for (a = 0; a < N; a++) bestw[a][0] = 0;
+ printf("Enter three words (EXIT to break): ");
+ a = 0;
+ while (1) {
+ st1[a] = fgetc(stdin);
+ if ((st1[a] == '\n') || (a >= max_size - 1)) {
+ st1[a] = 0;
+ break;
+ }
+ a++;
+ }
+ if (!strcmp(st1, "EXIT")) break;
+ cn = 0;
+ b = 0;
+ c = 0;
+ while (1) {
+ st[cn][b] = st1[c];
+ b++;
+ c++;
+ st[cn][b] = 0;
+ if (st1[c] == 0) break;
+ if (st1[c] == ' ') {
+ cn++;
+ b = 0;
+ c++;
+ }
+ }
+ cn++;
+ if (cn < 3) {
+ printf("Only %lld words were entered.. three words are needed at the input to perform the calculation\n", cn);
+ continue;
+ }
+ for (a = 0; a < cn; a++) {
+ for (b = 0; b < words; b++) if (!strcmp(&vocab[b * max_w], st[a])) break;
+ if (b == words) b = 0;
+ bi[a] = b;
+ printf("\nWord: %s Position in vocabulary: %lld\n", st[a], bi[a]);
+ if (b == 0) {
+ printf("Out of dictionary word!\n");
+ break;
+ }
+ }
+ if (b == 0) continue;
+ printf("\n Word Distance\n------------------------------------------------------------------------\n");
+ for (a = 0; a < size; a++) vec[a] = M[a + bi[1] * size] - M[a + bi[0] * size] + M[a + bi[2] * size];
+ len = 0;
+ for (a = 0; a < size; a++) len += vec[a] * vec[a];
+ len = sqrt(len);
+ for (a = 0; a < size; a++) vec[a] /= len;
+ for (a = 0; a < N; a++) bestd[a] = 0;
+ for (a = 0; a < N; a++) bestw[a][0] = 0;
+ for (c = 0; c < words; c++) {
+ if (c == bi[0]) continue;
+ if (c == bi[1]) continue;
+ if (c == bi[2]) continue;
+ a = 0;
+ for (b = 0; b < cn; b++) if (bi[b] == c) a = 1;
+ if (a == 1) continue;
+ dist = 0;
+ for (a = 0; a < size; a++) dist += vec[a] * M[a + c * size];
+ for (a = 0; a < N; a++) {
+ if (dist > bestd[a]) {
+ for (d = N - 1; d > a; d--) {
+ bestd[d] = bestd[d - 1];
+ strcpy(bestw[d], bestw[d - 1]);
+ }
+ bestd[a] = dist;
+ strcpy(bestw[a], &vocab[c * max_w]);
+ break;
+ }
+ }
+ }
+ for (a = 0; a < N; a++) printf("%50s\t\t%f\n", bestw[a], bestd[a]);
+ }
+ return 0;
+}