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# Import a two-column table and set them to x[n], y[n]

Posted 11 years ago
 Hello,I want to import a two column table of numeric data to Mathematica and set each number to two vector variables x and y.For example the below table:1  0.12  0.53  0.74  125  -3After importing I want to set x[1]=1, x[2]=2...x[5]=5; and y[1]=0.1, y[2]=0.5....y[5]=-3.I know how to import the table but I can not figure out how to import it and set variable simultaneously.Would you please help me out? Thanks.
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Posted 11 years ago
 This seems easier than that:Assuming a table "mydata", then it can be dumped into variables just by selecting the columns:  x = mydata[[All,1]]  y = mydata[[All,2]]
Posted 11 years ago
 MapIndexed[] knows the part of the expression its function is acting on: In[1]:= data = Table[{n, n/10.}, {n, 5}];  In[2]:= f[{xx_, yy_}, {n_}] := (x[n] = xx; y[n] = yy;)  In[3]:= MapIndexed[f, data, {1}];  In[4]:= {x[2], y[2]}  Out[4]= {2, 0.2}
Posted 11 years ago
 Hi over there, in the simplest way it is In[51]:= SetDirectory[NotebookDirectory[]]  Out[51]= "N:\\Udo\\Abt_N"  In[56]:= FilePrint[".\\test\\hungPhan.txt"] During evaluation of In[56]:=  1 0.1 2 0.53 0.74 125 -3In[61]:= {x, y} = Transpose[Import[".\\test\hungPhan.txt", "Table"]]During evaluation of In[61]:= Syntax::stresc: Unknown string escape \h.During evaluation of In[61]:= Syntax::stresc: Unknown string escape \h.Out[61]= {{1, 2, 3, 4, 5}, {0.1, 0.5, 0.7, 12, -3}}In[59]:= x[[4]]Out[59]= 4In[60]:= y[[4]]Out[60]= 12RegardsUdo.
Posted 11 years ago
 In[1]:= Evaluate[ Table[{x[i], y[i]}, {i, 1, 5}]] = {{1, .1}, {2, .5}, {3, .7}, {4, 12}, {5, -3}}  Out[1]= {{1, 0.1}, {2, 0.5}, {3, 0.7}, {4, 12}, {5, -3}}  In[2]:= x[3]  Out[2]= 3 In[3]:= y[2]Out[3]= 0.5Watch out if you do that more than one time. You might look up Clear and Evaluation->Quit Kernel->Local->Quit
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