MATLAB 작업 공간의 열에서 배열로 특정 행 선택

Question

해당 열의 데이터로 채워진 열이 있는데이 열의 첫 번째 행을 선택하지만 두 번째 행을 건너 뛰고 세 번째 행을 선택하면 그들을 배열에 삽입하십시오. 행의

예 :

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
'2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59:60:61:62:63:64:65:66:67:68:69:70:71:72:73:74:75:76:77:78:79:80:81:82:83:84:85:86:87:88:89:90:91:92:93:94:95:96:97:98:99:100:101:102:103:104:105:106:107:108:109:110:111:112:113:114:115:116:117:118:119:120:121:122:123:124:125:126:127:128:129:130:131:132:133:134:135:136' 
'1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59:60:61:62:63:64:65:66:67:68:69:70:71:72:73:74:75:76:77:78:79:80:81:82:83:84:85:86:87:88:89:90:91:92:93:94:95:96:97:98:99:100:101:102:103:104:105:106:107:108:109:110:111:112:113:114:115:116:117:118:119:120:121:122:123:124:125:126:127:128:129:130:131:132:133:134:135:136:137:138:139:140:141' 
'1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:52A:53:54:55:56:57:58:59:60:61:62:63:64:65:66:67:68:69:70:71:72:73:74:75:76:77:78:79:80:81:82:82A:82B:82C:83:84:85:86:87:88:89:90:91:92:93:94:95:96:97:98:99:100:100A:100B:100C:101:102:103:104:105:106:107:108:109:110:111:112:113:114:115:116:117:118:119:120:121:122:123:124:125:126:127:128:129:130:133:134:135:136:137:138:139:140:141:142:143:144:145:146:147:148:149:150:151:152:153:154:156:157:162:163:164:165:166:167:168:169:171:172:173:174:175:176:177:178:179:180:182:183:184:185:186:187:188:189:190:191:192:193:194:195:196:197:198:199:200:203:205:206:207:208:209:210:211:212:213:214:215:216:217:218:219:220:221:222:225:226:227' 
'1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:52A:53:54:55:56:57:58:59:60:61:62:63:64:65:66:67:68:69:70:71:72:73:74:75:76:77:78:79:80:81:82:82A:82B:82C:83:84:85:86:87:88:89:90:91:92:93:94:95:96:97:98:99:100:100A:100B:100C:101:102:103:104:105:106:107:108:109:110:111:112:113:114:115:116:117:118:119:120:121:122:123:124:125:126:127:128:129:130:133:134:135:136:137:138:139:140:141:142:143:144:145:146:147:148:149:150:151:152:153:154:156:157:162:163:164:165:166:167:168:169:171:172:173:174:175:176:177:178:179:180:182:183:184:185:186:187:188:189:190:191:192:193:194:195:196:197:198:199:200:203:205:206:207:208:209:210:211:212:213:214:215:216:217:218:219:220:221:222:225:226:227' 
'1:2:3:4:5:6:7:8:9:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59:60:61:62:63:64:65:66:67:68:69:70:71:72:73:74:75:76:77:78:79:80:81:82:83:84:85:86:87:88:89:90:91:92:93:94:95:96:97:98:99:100:101:102:103:104:105:106:107:108:109:110:111:112:113:114:115:116:117:118:119:120:121:122:123:124:125:126:127:128:129:130:131:132:133:134:135:136:137:138:139:140:141:142:143:144:145:146:147:148:149:150:151:152:153:154:155:156:157:158:159:160:161:162:163:164:165:166:167:168:169:170:171:172:173:174:175:176:177:178:179:180:181:182:183:184:185:186:187:188:189:190:191:192:193:194:195:196:197:198:199:200:201:202:203:204:205:206:207:208:209:210:211:212:213:214:215:216:217:218:219:220:221:222:223:224:225:226:227:228:229:230:231:232:233:234:235:236:237:238:239:240:241:242:243:244:245:246:247:248:249:250:251:252:253:254:255:256:257:258:259:260:261:262:263:264:265:266:267:268:269:270:271:272:273:274:275:276:277:278:279:280:281:282:283:284:285:286:287:288:289:290:291:292:293:294:295:296:297:298:299:300:301:302:303:304:305:306:307:308:309:310:311:312:313:314:315:316:317:318:319:320:321:322:323' 

기본적으로, 나는 153....282 첫 번째 행을 선택한 다음 30...1661 인 3 행을 선택하고 그에 따라 다른 모든 행에 대해이 과정을 반복 할 것입니다. 거기에서 그 배열에 데이터를 삽입하고 싶습니다.

이 데이터의 출처는 내 작업 영역으로 가져온 PostgreSQL 데이터베이스의 것입니다.

이 작업을 수행 할 수 있습니까?

Answer 1

만약 내가 제대로 이해와 예를 들어, 3 행을 얻을 수 있도록 A의 요소를 해당이 작동합니다 :

을

output = data([1 3],:); 

data의 첫 번째 행과 세 번째 행을 선택하고 output이라는 새 변수에 추가합니다. 이것은 첫 번째 행에서 시작

output = data(1:2:end, :); 

가 끝날 때까지 매 2 행을 선택 : 모든 홀수 행을 선택하려면이 같은 대장의 표기와 end 키워드를 사용합니다.

Answer 2

한 가지 해결책은 텍스트 파일에 모두 덤프 한 다음 data = importdata(file.txt,':')처럼 구분 문자를 지정할 수있는 importdata()을 사용하는 것입니다. 그러면 숫자로 가득 찬 MATLAB 배열 data을 얻을 수 있습니다. 그러면 원하는대로 처리 할 수 ​​있습니다.

Answer 3

데이터를 가져온 후 A이라는 문자열의 셀 배열이라고 가정 해 봅니다 (각 행의 작은 따옴표로 인해 질문에 나타나는 것처럼 보입니다). 먼저 데이터에 나타나는 문자를 없애자. 아마 숫자 만 필요하기 때문이다.

A = cellfun(@(x) regexprep(x, '[^\d:]', ''), A,'UniformOutput',0); 

다음으로, 우리는 정수

B = cellfun(@(x) strread(x, '%d:', -1), A, 'UniformOutput',0); 

의 배열로, 각 행을 구문 분석 strread 함수를 사용하기 B의 각 요소의 배열 형태 : 우리는 정규식 여분으로 이렇게 당신이

B{3}