这是一段求振动烈度的matlab程序，求高手给分析一下。

求matlab给分析下，这段程序怎么实现的。分数一定加满！

clc;
clear all;
Nx=5;
Ny=5;
Nz=5;

load x1.txt
Vx1=x1(:,2);
[mx1,nx1]=size(x1);
VX1=sqrt(sum(Vx1.^2)/mx1);
load x2.txt
Vx2=x2(:,2);
[mx2,nx2]=size(x2);
VX2=sqrt(sum(Vx2.^2)/mx2);
load x3.txt
Vx3=x3(:,2);
[mx3,nx3]=size(x3);
VX3=sqrt(sum(Vx3.^2)/mx3);
load x4.txt
Vx4=x4(:,2);
[mx4,nx4]=size(x4);
VX4=sqrt(sum(Vx4.^2)/mx4);
load x5.txt
Vx5=x5(:,2);
[mx5,nx5]=size(x5);
VX5=sqrt(sum(Vx5.^2)/mx5);
EVx=VX1+VX2+VX3+VX4+VX5;
EVx;

load y1.txt
Vy1=y1(:,2);
[my1,ny1]=size(y1);
VY1=sqrt(sum(Vy1.^2)/my1);
load y2.txt
Vy2=y2(:,2);
[my2,ny2]=size(y2);
VY2=sqrt(sum(Vy2.^2)/my2);
load y3.txt
Vy3=y3(:,2);
[my3,ny3]=size(y3);
VY3=sqrt(sum(Vy3.^2)/my3);
load y4.txt
Vy4=y4(:,2);
[my4,ny4]=size(y4);
VY4=sqrt(sum(Vy4.^2)/my4);
load y5.txt
Vy5=y5(:,2);
[my5,ny5]=size(y5);
VY5=sqrt(sum(Vy5.^2)/my5);
EVy=VY1+VY2+VY3+VY4+VY5;
EVy;

load z1.txt
Vz1=z1(:,2);
[mz1,nz1]=size(z1);
VZ1=sqrt(sum(Vz1.^2)/mz1);
load z2.txt
Vz2=z2(:,2);
[mz2,nz2]=size(z2);
VZ2=sqrt(sum(Vz2.^2)/mz2);
load z3.txt
Vz3=z3(:,2);
[mz3,nz3]=size(z3);
VZ3=sqrt(sum(Vz3.^2)/mz3);
load z4.txt
Vz4=z4(:,2);
[mz4,nz4]=size(z4);
VZ4=sqrt(sum(Vz4.^2)/mz4);
load z5.txt
Vz5=z5(:,2);
[mz5,nz5]=size(z5);
VZ5=sqrt(sum(Vz5.^2)/mz5);
EVz=VZ1+VZ2+VZ3+VZ4+VZ5;
EVz;

Vrms=sqrt((EVx/Nx)^2+(EVy/Ny)^2+(EVz/Nz)^2);
Vrms;

建议搜索matlab索引方法，help 求和函数sum,获取矩阵大小size,开平方sqrt函数用法，load是加载txt 或者其他文件函数到程序中。望采纳！

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