# User Portlet

Discussions |
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In the attached nb. is an illustration of numerical integration. I have an error in the syntax; can someone help me find it. thanks |

Given: L1 = {{x1,y1},{x2,y2},{x3,y3},{x4,y4},...........{xn,yn}}: how is L2 below, obtain: L2 = {{ax1,y1},{ax2,y2},{ax3,y3},{ax4,y4}.....{axn,yn}} |

Given the following data, data1={{x1, y1},{x2, y2},{x3, y3},{x4, y4},............{xn, yn}} How do integrate data1 to get Nintegrate[data1] = {{x1, y1?},{x2, y2?},{x3, y3?},{x4, y4?},............{xn, yn?}} |

Given the two lists; how do you multiply them? L1 = {{X1 , y1}, {X2 , y2}, {X3 , y3}, {X4, y4},
...,{Xn, yn}} L2 = {{X1 , z1}, {X2 , z2}, {X3 , z3}, {X4, z4},
,,{Xn, zn}} To obtain: L1*L2 = {{ X1 , y1* z1}, { X2 , y2* z2}, { X3 , y3* z3}, {... |

Given an integral with a goal to plot the output as a function of one of the variable in the integrand. |

Integrate[Exp[- (2 \[Pi] S Abs[x-y])/B]* Cos[(2 \[Pi] S)*(x-y)]* Sin[1 \[Pi] x]Sin[1 \[Pi] y],{x,.001,1}, {y,.001,1}] Where S and B are input numbers and x and y are variables of integration |

How do you unprotect variables so that they can be used in computations. I used the Unprotect[ ] command and I get variable results in the application; see the attached nb. |

I am using v10 to achieve numerical of a cell imported from excel. The data are 'y' values and deltax is .12. I am unable to understand and apply the appreciate syntax; see attached nb. |

I think times and dates should be on Dashboard inputs |

In structural dynamics analysis (SDA) of continuous systems with random space and time inputs, complex numerical integrations are required. The inputs data are given in tables and the outputs are needed in table for continued analysis for further... |