Thanks Otto,

I tried the code, but for some reason is not working, i don't know if i doing something wrong.

Thank you very much

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Hello Otto,

I was about to say that it is great to have the option to have help in spanish...

So i try this

In[49] Part[Select[data, #[[1]] == "1 VTS" &], All, 3](Selecciona la columna 3 asociada a 1 VTS)

Out[49] {2., 1., 1., 3., 2., 3., 2., 5., 4.}

This allowed me to get the data of the column 3 associated to 1 VST. Then i tried to get the data of the column 3 associated to the sex of the participants

In[30] Part[Select[data, #[[1]] == "1 VTS" &], All, {3, 7}]

Out[30] {{2., "Female "}, {1., "Male "}, {1., "Female "}, {3., "Female "}, {2., "Female "}, {3., "Male "}, {2., "Female "}, {5., "Male "}, {4., "Female "}}

But i am no able to get the data of the column 3 associated to a specific sex, for example the data associated only to females. Could you indicate me how to do that?

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Hola Otto,

Muchas gracias por ayudarme a entender aun más el funcionamiento de estas herramientas, todos son muy amables. Ese comando que me muestras me permite seleccionar lo que necesito, es decir, solo la columna 3 asociada a 1 VTS, me gustaría saber si con ese mimo comando se puede hacer algo como seleccionar la columna 3 pero esta vez asociada al sexo de los participantes, intenté esto pero no funciona Part[Select[data, #[[1]] == "1 VTS" &], All, 3]

Muchas gracias

Hola Luis,

eres muy amable, ya he logrado individualizar vectores y hacer operaciones entre ellos (como se ve en la imagen), lo cual era mi objetivo, aún no domino muy bien la técnica pero creo que es cuestión de practicar. Muchas gracias por la guía que me has dado

Ssaludos

Hi Oscar,

Attached is a notebook example which imports your data. It then uses the Mathematca function GatherBy to group the data into sublists, where each sublist contains the records for a given protocol. At this point, a separate but identical analysis can be run on each of these sublists to get a separate analysis for each protocol. I would usually do that be making a function that performs an analysis and then mapping it onto the data collection, but that is a bit advanced. You can also copy the analysis, with new input. Where each input is one of the sublists.

Best, David

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I checked -- it was not new syntax in 10. I think it's been available for quite a while.

You can use select together with a selection condition to extract rows by content. For example, code below uses a pure function that returns True for a particular match. A row is selected if the 2nd column contains precisely "B"

In[6]:= set = {"A", "B", "C", "D"};

In[7]:= data = RandomChoice[set, {9, 5}]

Out[7]= {{"D", "D", "B", "C", "A"}, {"A", "C", "A", "A", "C"}, {"C", 
  "B", "D", "B", "C"}, {"B", "A", "A", "C", "C"}, {"B", "B", "A", "B",
   "C"}, {"B", "C", "B", "B", "C"}, {"D", "D", "B", "D", "A"}, {"D", 
  "C", "D", "C", "D"}, {"A", "A", "C", "B", "A"}}

In[8]:= Select[data, #[[2]] === "B" &]

Out[8]= {{"C", "B", "D", "B", "C"}, {"B", "B", "A", "B", "C"}}

Oscar,

I'm not sure I understand but if you want only a particular range of rows for a given column, it can be done like this in V10:

In[3]:= d = Table[10 j + i, {j, 9}, {i, 5}]

Out[3]= {{11, 12, 13, 14, 15}, {21, 22, 23, 24, 25}, {31, 32, 33, 34, 
  35}, {41, 42, 43, 44, 45}, {51, 52, 53, 54, 55}, {61, 62, 63, 64, 
  65}, {71, 72, 73, 74, 75}, {81, 82, 83, 84, 85}, {91, 92, 93, 94, 
  95}}

In[4]:= d[[3 ;; 5, 2]]

Out[4]= {32, 42, 52}