Mathematica Tutorial: Notebooks And Documents - Wolfram Research

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104 Notebooks and DocumentsIn[10]:=This creates an expression from an InputForm string.ToExpression@"x^2 + y^2"DOut[10]= x 2 + y 2In[11]:=This creates the same expression from StandardForm boxes.ToExpression@RowBox@8SuperscriptBox@"x", "2"D, "+", SuperscriptBox@"y", "2"D
Notebooks and Documents 105ToExpression will attempt to interpret any string as Mathematica input. But if you give it astring that does not correspond to syntactically correct input, then it will print a message, andreturn $Failed.This is not syntactically correct input, so ToExpression does not convert it to an expression.In[16]:= ToExpression@"1 +ê+ 2"DToExpression::sntx: Syntax error in or before "1 +/+ 2".^Out[16]= $FailedToExpression requires that the string correspond to a complete Mathematica expression.In[17]:= ToExpression@"1 + 2 + "DToExpression::sntxi:Incomplete expression; more input is needed.Out[17]= $FailedYou can use the function SyntaxQ to test whether a particular string corresponds to syntacticallycorrect Mathematica input. If SyntaxQ returns False, you can find out where the erroroccurred using SyntaxLength. SyntaxLength returns the number of characters which weresuccessfully processed before a syntax error was detected.SyntaxQ shows that this string does not correspond to syntactically correct Mathematica input.In[18]:= SyntaxQ@"1 +ê+ 2"DOut[18]= FalseSyntaxLength reveals that an error was detected after the third character in the string.In[19]:= SyntaxLength@"1 +ê+ 2"DOut[19]= 3Here SyntaxLength returns a value greater than the length of the string, indicating that theinput was correct so far as it went, but needs to be continued.In[20]:= SyntaxLength@"1 + 2 + "DOut[20]= 10
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Wolfram Mathematica ® Tutorial Col
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ContentsNotebook InterfaceNotebook
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Notebook InterfaceUsing a Notebook
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Notebooks and Documents 3After you
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Notebooks and Documents 5Once you h
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Notebooks and Documents 7The except
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Notebooks and Documents 9Double-cli
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Notebooks and Documents 11This show
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Notebooks and Documents 13The inser
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Notebooks and Documents 15Alternati
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Notebooks and Documents 17When a gr
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Notebooks and Documents 19To Open a
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Notebooks and Documents 21The Optio
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Notebooks and Documents 23Setting O
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Notebooks and Documents 25FeaturesC
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Notebooks and Documents 27ZoomingTh
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Notebooks and Documents 29In[2]:=Th
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Notebooks and Documents 31Here is a
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Notebooks and Documents 33Subscript
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Notebooks and Documents 35This puts
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Notebooks and Documents 37Shift +Re
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Notebooks and Documents 39special c
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Notebooks and Documents 41two-dimen
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Much as Mathematica distinguishes b
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Notebooks and Documents 45In[7]:=To
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Notebooks and Documents 47Non-Engli
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Notebooks and Documents 49full name
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Notebooks and Documents 51Mathemati
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Page 59 and 60: Notebooks and Documents 55Here is a
Page 61 and 62: Notebooks and Documents 57Expositio
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Page 75 and 76: Notebooks and Documents 71The strin
Page 77 and 78: Notebooks and Documents 73Using tex
Page 79 and 80: Notebooks and Documents 75Here is p
Page 81 and 82: Notebooks and Documents 77Having de
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Page 87 and 88: Notebooks and Documents 83In[15]:=T
Page 89 and 90: Notebooks and Documents 85When Back
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Page 93 and 94: Notebooks and Documents 89You can c
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Page 105 and 106: Notebooks and Documents 101Within
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Page 111 and 112: Notebooks and Documents 107Thus, fo
Page 113 and 114: Notebooks and Documents 109Plus is
Page 115 and 116: Notebooks and Documents 111Operator
Page 117 and 118: Notebooks and Documents 113x yx +x
Page 119 and 120: Notebooks and Documents 115Internal
Page 121 and 122: Notebooks and Documents 117It is fa
Page 123 and 124: Notebooks and Documents 119Print@ex
Page 125 and 126: Notebooks and Documents 121Formatte
Page 127 and 128: Notebooks and Documents 123Look aga
Page 129 and 130: Notebooks and Documents 125As you c
Page 131 and 132: Notebooks and Documents 127We have
Page 133 and 134: Notebooks and Documents 129In[19]:=
Page 135 and 136: Notebooks and Documents 131Table@Po
Page 137 and 138: Notebooks and Documents 133Default
Page 139 and 140: Notebooks and Documents 135Using th
Page 141 and 142: Notebooks and Documents 137In[4]:=Y
Page 143 and 144: Notebooks and Documents 139you real
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Page 147 and 148: Notebooks and Documents 143You can
Page 149 and 150: Notebooks and Documents 145Manipula
Page 151 and 152: Notebooks and Documents 147optionde
Page 153 and 154: Notebooks and Documents 149Here is
Page 155 and 156: Notebooks and Documents 151Notebook
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Notebooks and Documents 155This cha
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Notebooks and Documents 157In[11]:=
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Notebooks and Documents 159Notebook
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Functions like NotebookWrite and Se
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Simple and Compound Front End Token
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Notebooks and Documents 169Executin
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Notebooks and Documents 171Here is
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Notebooks and Documents 173In the s
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Notebooks and Documents 175The way
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Notebooks and Documents 177In[3]:=T
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Notebooks and Documents 179optionty
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Notebooks and Documents 181Addition
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Notebooks and Documents 183With Hyp
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Notebooks and Documents 185"Courier
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Notebooks and Documents 189For most
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Notebooks and Documents 195Clicking
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Notebooks and Documents 197i max⁄
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Notebooks and Documents 201Characte
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Notebooks and Documents 205You can
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Essentially all symbols with built-
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Notebooks and Documents 209Letters
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Notebooks and Documents 211Curly Gr
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Notebooks and Documents 213Formal s
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Notebooks and Documents 215Units an
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Notebooks and Documents 217form ful
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é \[EAcute] Çe'Çē \[EBar] Çe-
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Notebooks and Documents 221xµy Tim
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Notebooks and Documents 223Operator
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Notebooks and Documents 225The spec
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Notebooks and Documents 227form ful
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Notebooks and Documents 229Structur
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Notebooks and Documents 231formÖá
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Mathematica Tutorial: Notebooks And Documents - Wolfram Research

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