search for: 2x3x4

Hello people, Is there some simple way of spinning and/or flipping arrays in R? Here's what I mean. Suppose that foo is a 2x3x4 array with the following contents: (I know this is different than typing 'foo' at and R prompt, but I'm so used to row major order from using APL, I have a hard time with R's output) > foo[1,,] [,1] [,2] [,3] [,4] [1,] 1 2 3 4 [2,] 5 6 7 8 [3,]...

...se comportan con esa > agrupación. Por tanto, obtendré varios errores asociados a clasificación > porqué haré cross-validation. > > De esta forma, si pruebo 2 algoritmos de extracción de > características, 3 de clustering y 4 de clasificación, tengo un > experimento factorial 2x3x4, ¿no? > > Lo que me gustaría obtener posteriormente es la mejor combinación > de técnica de extracción de características, algoritmo de clustering y > clasificador, teniendo en cuenta los errores de clasificación y cuán > bien los algoritmos de clustering agrupan. > >...

Hola, Daniel: Quizá deberías ser más explícito porque de la información que suministras yo solo te puedo decir que no veo la relación entre los 3 tipos de algoritmos que nombras: - un análisis de componentes principales puede ser una fase previa de los otros dos - hacer un cluster es un tipo de aprendizaje no supervisado, mientras que un clasificador normalmente es utilizado en aprendizaje

...obtendré varios errores asociados a >clasificación >> > porqué haré cross-validation. >> > >> > De esta forma, si pruebo 2 algoritmos de extracción de >> > características, 3 de clustering y 4 de clasificación, tengo un >> > experimento factorial 2x3x4, ¿no? >> > >> > Lo que me gustaría obtener posteriormente es la mejor >combinación >> > de técnica de extracción de características, algoritmo de >clustering y >> > clasificador, teniendo en cuenta los errores de clasificación y >cuán >> >...

...Do My Matrices Lose Dimensions? When a matrix with a single row or column is created by a subscripting operation, e.g., row <- mat[2, ], it is by default turned into a vector. In a similar way if an array with dimension, say, 2x3x1x4 is created by subscripting it will be coerced into a 2x3x4 array, losing the unnecessary dimension. After much discussion this has been determined to be a feature. To prevent this happening, add the option `drop = FALSE' to the subscripting. For example, rowmatrix <- mat[2, , drop = F] # creates a row matrix colmatrix &...

...Do My Matrices Lose Dimensions? When a matrix with a single row or column is created by a subscripting operation, e.g., row <- mat[2, ], it is by default turned into a vector. In a similar way if an array with dimension, say, 2x3x1x4 is created by subscripting it will be coerced into a 2x3x4 array, losing the unnecessary dimension. After much discussion this has been determined to be a feature. To prevent this happening, add the option `drop = FALSE' to the subscripting. For example, rowmatrix <- mat[2, , drop = F] # creates a row matrix colmatrix &...

...Do My Matrices Lose Dimensions? When a matrix with a single row or column is created by a subscripting operation, e.g., row <- mat[2, ], it is by default turned into a vector. In a similar way if an array with dimension, say, 2x3x1x4 is created by subscripting it will be coerced into a 2x3x4 array, losing the unnecessary dimension. After much discussion this has been determined to be a feature. To prevent this happening, add the option `drop = FALSE' to the subscripting. For example, rowmatrix <- mat[2, , drop = F] # creates a row matrix colmatrix &...

...Do My Matrices Lose Dimensions? When a matrix with a single row or column is created by a subscripting operation, e.g., row <- mat[2, ], it is by default turned into a vector. In a similar way if an array with dimension, say, 2x3x1x4 is created by subscripting it will be coerced into a 2x3x4 array, losing the unnecessary dimension. After much discussion this has been determined to be a feature. To prevent this happening, add the option `drop = FALSE' to the subscripting. For example, rowmatrix <- mat[2, , drop = F] # creates a row matrix colmatrix &...