# How to create an alternately increasing sequence in R?

To create an alternately increasing sequence, we can take help of logical constants in the R language that is TRUE and FALSE. While creating a vector, the first value will be set to FALSE and the second value will be set to TRUE, therefore, the resulting vector will always have an alternately increasing sequence.

Check out the below given examples to understand how it works.

## Example 1

To create an alternately increasing sequence in R, use the code given below −

x1<-c(1:200)[c(F,T)]
x1

If you execute the above given code, it generates the following output −

[1] 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
[19] 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
[37] 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108
[55] 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144
[73] 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180
[91] 182 184 186 188 190 192 194 196 198 200

## Example 2

To create an alternately increasing sequence in R, use the code given below −

x2<-c(1:200)[c(T,F)]
x2

If you execute the above given code, it generates the following output −

[1] 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35
[19] 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71
[37] 73 75 77 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107
[55] 109 111 113 115 117 119 121 123 125 127 129 131 133 135 137 139 141 143
[73] 145 147 149 151 153 155 157 159 161 163 165 167 169 171 173 175 177 179
[91] 181 183 185 187 189 191 193 195 197 199

## Example 3

To create an alternately increasing sequence in R, use the code given below −

x3<-c(2,3:200)[c(T,F)]
x3

If you execute the above given code, it generates the following output −

[1] 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
[19] 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
[37] 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108
[55] 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144
[73] 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180
[91] 182 184 186 188 190 192 194 196 198 200

## Example 4

To create an alternately increasing sequence in R, use the code given below −

x4<-c(2,3:200)[c(F,T)]
x4

If you execute the above given code, it generates the following output −

[1] 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
[20] 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77
[39] 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115
[58] 117 119 121 123 125 127 129 131 133 135 137 139 141 143 145 147 149 151 153
[77] 155 157 159 161 163 165 167 169 171 173 175 177 179 181 183 185 187 189 191
[96] 193 195 197 199

## Example 5

To create an alternately increasing sequence in R, use the code given below −

x5<-c(10,11:200)[c(F,T)]
x5

If you execute the above given code, it generates the following output −

[1] 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
[20] 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85
[39] 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115 117 119 121 123
[58] 125 127 129 131 133 135 137 139 141 143 145 147 149 151 153 155 157 159 161
[77] 163 165 167 169 171 173 175 177 179 181 183 185 187 189 191 193 195 197 199

## Example 6

To create an alternately increasing sequence in R, use the code given below −

x6<-c(10,11:200)[c(T,F)]
x6

If you execute the above given code, it generates the following output −

[1] 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46
[20] 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84
[39] 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122
[58] 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160
[77] 162 164 166 168 170 172 174 176 178 180 182 184 186 188 190 192 194 196 198
[96] 200

## Example 7

To create an alternately increasing sequence in R, use the code given below −

x7<-c(101:300)[c(F,T)]
x7

If you execute the above given code, it generates the following output −

[1] 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136
[19] 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172
[37] 174 176 178 180 182 184 186 188 190 192 194 196 198 200 202 204 206 208
[55] 210 212 214 216 218 220 222 224 226 228 230 232 234 236 238 240 242 244
[73] 246 248 250 252 254 256 258 260 262 264 266 268 270 272 274 276 278 280
[91] 282 284 286 288 290 292 294 296 298 300

## Example 8

To create an alternately increasing sequence in R, use the code given below −

x8<-c(101:300)[c(T,F)]
x8

If you execute the above given code, it generates the following output −

[1] 101 103 105 107 109 111 113 115 117 119 121 123 125 127 129 131 133 135
[19] 137 139 141 143 145 147 149 151 153 155 157 159 161 163 165 167 169 171
[37] 173 175 177 179 181 183 185 187 189 191 193 195 197 199 201 203 205 207
[55] 209 211 213 215 217 219 221 223 225 227 229 231 233 235 237 239 241 243
[73] 245 247 249 251 253 255 257 259 261 263 265 267 269 271 273 275 277 279
[91] 281 283 285 287 289 291 293 295 297 299