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模仿某Al，这里当作备忘录好了

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1l
IP属地:山东1楼2018-04-16 13:58回复
    matlab c后面跟着数字是什么意思
    IP属地:山东2楼2018-04-16 13:58
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      rest in the memories
      IP属地:山东来自手机贴吧3楼2018-04-19 01:42
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        喜大普奔
        a=C6 + C5*t - (450*cos((pi*t)/30)^2)/pi^2 + (33675*cos((pi*t)/30)^4)/pi^2 - (1003540*cos((pi*t)/30)^6)/pi^2 + (110648070*cos((pi*t)/30)^8)/(7*pi^2) - (1059908928*cos((pi*t)/30)^10)/(7*pi^2) + (6698244800*cos((pi*t)/30)^12)/(7*pi^2) - (205657459200*cos((pi*t)/30)^14)/(49*pi^2) + (13192663680*cos((pi*t)/30)^16)/pi^2 - (30287544320*cos((pi*t)/30)^18)/pi^2 + (51221643264*cos((pi*t)/30)^20)/pi^2 - (446093721600*cos((pi*t)/30)^22)/(7*pi^2) + (403234816000*cos((pi*t)/30)^24)/(7*pi^2) - (257540751360*cos((pi*t)/30)^26)/(7*pi^2) + (771049390080*cos((pi*t)/30)^28)/(49*pi^2) - (4043309056*cos((pi*t)/30)^30)/pi^2 + (471859200*cos((pi*t)/30)^32)/pi^2
        subs(a,t,0)
        IP属地:山东4楼2018-04-19 22:59
        回复
          ans = C6 - 1/pi^2
          IP属地:山东5楼2018-04-19 23:00
          回复
            >> diff(a,t)ans =
            C5 + (30*cos((pi*t)/30)*sin((pi*t)/30))/pi - (4490*cos((pi*t)/30)^3*sin((pi*t)/30))/pi + (200708*cos((pi*t)/30)^5*sin((pi*t)/30))/pi - (29506152*cos((pi*t)/30)^7*sin((pi*t)/30))/(7*pi) + (353302976*cos((pi*t)/30)^9*sin((pi*t)/30))/(7*pi) - (2679297920*cos((pi*t)/30)^11*sin((pi*t)/30))/(7*pi) + (13710497280*cos((pi*t)/30)^13*sin((pi*t)/30))/(7*pi) - (7036087296*cos((pi*t)/30)^15*sin((pi*t)/30))/pi + (18172526592*cos((pi*t)/30)^17*sin((pi*t)/30))/pi - (34147762176*cos((pi*t)/30)^19*sin((pi*t)/30))/pi + (327135395840*cos((pi*t)/30)^21*sin((pi*t)/30))/(7*pi) - (322587852800*cos((pi*t)/30)^23*sin((pi*t)/30))/(7*pi) + (223201984512*cos((pi*t)/30)^25*sin((pi*t)/30))/(7*pi) - (102806585344*cos((pi*t)/30)^27*sin((pi*t)/30))/(7*pi) + (4043309056*cos((pi*t)/30)^29*sin((pi*t)/30))/pi - (503316480*cos((pi*t)/30)^31*sin((pi*t)/30))/pi
            >> ll=ans
            ll =
            C5 + (30*cos((pi*t)/30)*sin((pi*t)/30))/pi - (4490*cos((pi*t)/30)^3*sin((pi*t)/30))/pi + (200708*cos((pi*t)/30)^5*sin((pi*t)/30))/pi - (29506152*cos((pi*t)/30)^7*sin((pi*t)/30))/(7*pi) + (353302976*cos((pi*t)/30)^9*sin((pi*t)/30))/(7*pi) - (2679297920*cos((pi*t)/30)^11*sin((pi*t)/30))/(7*pi) + (13710497280*cos((pi*t)/30)^13*sin((pi*t)/30))/(7*pi) - (7036087296*cos((pi*t)/30)^15*sin((pi*t)/30))/pi + (18172526592*cos((pi*t)/30)^17*sin((pi*t)/30))/pi - (34147762176*cos((pi*t)/30)^19*sin((pi*t)/30))/pi + (327135395840*cos((pi*t)/30)^21*sin((pi*t)/30))/(7*pi) - (322587852800*cos((pi*t)/30)^23*sin((pi*t)/30))/(7*pi) + (223201984512*cos((pi*t)/30)^25*sin((pi*t)/30))/(7*pi) - (102806585344*cos((pi*t)/30)^27*sin((pi*t)/30))/(7*pi) + (4043309056*cos((pi*t)/30)^29*sin((pi*t)/30))/pi - (503316480*cos((pi*t)/30)^31*sin((pi*t)/30))/pi
            >> subs(ll,t,0)
            ans =
            C5
            菜鸡速度，势如破竹
            IP属地:山东6楼2018-04-19 23:13
            回复
              这个才是正常操作。。
              IP属地:山东8楼2018-04-20 17:38
              回复
                x0 - (450*cos((pi*(y - y0))/(30*y0d))^2)/pi^2 + (33675*cos((pi*(y - y0))/(30*y0d))^4)/pi^2 - (1003540*cos((pi*(y - y0))/(30*y0d))^6)/pi^2 + (110648070*cos((pi*(y - y0))/(30*y0d))^8)/(7*pi^2) - (1059908928*cos((pi*(y - y0))/(30*y0d))^10)/(7*pi^2) + (6698244800*cos((pi*(y - y0))/(30*y0d))^12)/(7*pi^2) - (205657459200*cos((pi*(y - y0))/(30*y0d))^14)/(49*pi^2) + (13192663680*cos((pi*(y - y0))/(30*y0d))^16)/pi^2 - (30287544320*cos((pi*(y - y0))/(30*y0d))^18)/pi^2 + (51221643264*cos((pi*(y - y0))/(30*y0d))^20)/pi^2 - (446093721600*cos((pi*(y - y0))/(30*y0d))^22)/(7*pi^2) + (403234816000*cos((pi*(y - y0))/(30*y0d))^24)/(7*pi^2) - (257540751360*cos((pi*(y - y0))/(30*y0d))^26)/(7*pi^2) + (771049390080*cos((pi*(y - y0))/(30*y0d))^28)/(49*pi^2) - (4043309056*cos((pi*(y - y0))/(30*y0d))^30)/pi^2 + (471859200*cos((pi*(y - y0))/(30*y0d))^32)/pi^2 + (x0d*(y - y0))/y0d + 228155022448185/2251799813685248
                IP属地:山东9楼2018-04-20 17:56
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                  李四光406
                  IP属地:山东10楼2018-05-01 19:23
                  回复
                    cos(theta) - (450.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^2)./pi.^2 + (33675.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^4)./pi.^2 - (1003540.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^6)./pi.^2 + (110648070.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^8)./(7.*pi.^2) - (1059908928.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^10)./(7.*pi.^2) + (6698244800.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^12)./(7.*pi.^2) - (205657459200.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^14)./(49.*pi.^2) + (13192663680.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^16)./pi.^2 - (30287544320.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^18)./pi.^2 + (51221643264.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^20)./pi.^2 - (446093721600.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^22)./(7.*pi.^2) + (403234816000.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^24)./(7.*pi.^2) - (257540751360.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^26)./(7.*pi.^2) + (771049390080.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^28)./(49.*pi.^2) - (4043309056.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^30)/pi.^2 + (471859200.*cos((pi.*(y - sin(theta)))./(30.*y0d)).^32)./pi.^2 + (x0d.*(y - sin(theta)))./y0d + 228155022448185/2251799813685248;
                    IP属地:山东11楼2018-05-02 21:19
                    回复
                      f9=cos(theta) - (450*cos((pi*(sin(theta) - 10))/(30*y0d))^2)/pi^2 + (33675*cos((pi*(sin(theta) - 10))/(30*y0d))^4)/pi^2 - (1003540*cos((pi*(sin(theta) - 10))/(30*y0d))^6)/pi^2 + (110648070*cos((pi*(sin(theta) - 10))/(30*y0d))^8)/(7*pi^2) - (1059908928*cos((pi*(sin(theta) - 10))/(30*y0d))^10)/(7*pi^2) + (6698244800*cos((pi*(sin(theta) - 10))/(30*y0d))^12)/(7*pi^2) - (205657459200*cos((pi*(sin(theta) - 10))/(30*y0d))^14)/(49*pi^2) + (13192663680*cos((pi*(sin(theta) - 10))/(30*y0d))^16)/pi^2 - (30287544320*cos((pi*(sin(theta) - 10))/(30*y0d))^18)/pi^2 + (51221643264*cos((pi*(sin(theta) - 10))/(30*y0d))^20)/pi^2 - (446093721600*cos((pi*(sin(theta) - 10))/(30*y0d))^22)/(7*pi^2) + (403234816000*cos((pi*(sin(theta) - 10))/(30*y0d))^24)/(7*pi^2) - (257540751360*cos((pi*(sin(theta) - 10))/(30*y0d))^26)/(7*pi^2) + (771049390080*cos((pi*(sin(theta) - 10))/(30*y0d))^28)/(49*pi^2) - (4043309056*cos((pi*(sin(theta) - 10))/(30*y0d))^30)/pi^2 + (471859200*cos((pi*(sin(theta) - 10))/(30*y0d))^32)/pi^2 - \\\r\n(x0d*(sin(theta) - 10))/y0d + 228155022448185/2251799813685248;
                      for i=1:10000
                      x0d=rand(1);
                      y0d=rand(1);
                      theta=(rand(1)-0.5)*pi;
                      c(i)=eval(f9);
                      end
                      disp(c)
                      IP属地:山东12楼2018-05-02 22:07
                      收起回复
                        for i=1:10000
                        x0d=rand(1);
                        y0d=rand(1);
                        theta=(rand(1)-0.5)*pi;
                        c(i)=eval(f9);
                        end
                        cmin=min(c);
                        cmax=max(c);
                        k=linspace(cmin,cmax,5000);
                        cc=hist(c,k);
                        cc=cc/length(c);
                        bar(k,cc)
                        IP属地:山东13楼2018-05-02 22:14
                        回复
                          f6 =
                          cos(theta) - (450*cos((pi*(y - sin(theta)))/(30*y0d))^2)/pi^2 + (33675*cos((pi*(y - sin(theta)))/(30*y0d))^4)/pi^2 - (1003540*cos((pi*(y - sin(theta)))/(30*y0d))^6)/pi^2 + (110648070*cos((pi*(y - sin(theta)))/(30*y0d))^8)/(7*pi^2) - (1059908928*cos((pi*(y - sin(theta)))/(30*y0d))^10)/(7*pi^2) + (6698244800*cos((pi*(y - sin(theta)))/(30*y0d))^12)/(7*pi^2) - (205657459200*cos((pi*(y - sin(theta)))/(30*y0d))^14)/(49*pi^2) + (13192663680*cos((pi*(y - sin(theta)))/(30*y0d))^16)/pi^2 - (30287544320*cos((pi*(y - sin(theta)))/(30*y0d))^18)/pi^2 + (51221643264*cos((pi*(y - sin(theta)))/(30*y0d))^20)/pi^2 - (446093721600*cos((pi*(y - sin(theta)))/(30*y0d))^22)/(7*pi^2) + (403234816000*cos((pi*(y - sin(theta)))/(30*y0d))^24)/(7*pi^2) - (257540751360*cos((pi*(y - sin(theta)))/(30*y0d))^26)/(7*pi^2) + (771049390080*cos((pi*(y - sin(theta)))/(30*y0d))^28)/(49*pi^2) - (4043309056*cos((pi*(y - sin(theta)))/(30*y0d))^30)/pi^2 + (471859200*cos((pi*(y - sin(theta)))/(30*y0d))^32)/pi^2 + (x0d*(y - sin(th\\\r\neta)))/y0d + 228155022448185/2251799813685248
                          >> f9
                          f9 =
                          cos(theta) - (450*cos((pi*(sin(theta) - 10))/(30*y0d))^2)/pi^2 + (33675*cos((pi*(sin(theta) - 10))/(30*y0d))^4)/pi^2 - (1003540*cos((pi*(sin(theta) - 10))/(30*y0d))^6)/pi^2 + (110648070*cos((pi*(sin(theta) - 10))/(30*y0d))^8)/(7*pi^2) - (1059908928*cos((pi*(sin(theta) - 10))/(30*y0d))^10)/(7*pi^2) + (6698244800*cos((pi*(sin(theta) - 10))/(30*y0d))^12)/(7*pi^2) - (205657459200*cos((pi*(sin(theta) - 10))/(30*y0d))^14)/(49*pi^2) + (13192663680*cos((pi*(sin(theta) - 10))/(30*y0d))^16)/pi^2 - (30287544320*cos((pi*(sin(theta) - 10))/(30*y0d))^18)/pi^2 + (51221643264*cos((pi*(sin(theta) - 10))/(30*y0d))^20)/pi^2 - (446093721600*cos((pi*(sin(theta) - 10))/(30*y0d))^22)/(7*pi^2) + (403234816000*cos((pi*(sin(theta) - 10))/(30*y0d))^24)/(7*pi^2) - (257540751360*cos((pi*(sin(theta) - 10))/(30*y0d))^26)/(7*pi^2) + (771049390080*cos((pi*(sin(theta) - 10))/(30*y0d))^28)/(49*pi^2) - (4043309056*cos((pi*(sin(theta) - 10))/(30*y0d))^30)/pi^2 + (471859200*cos((pi*(sin(theta) - 10))/(30*y0d))^32)/pi^2 - \\\r\n(x0d*(sin(theta) - 10))/y0d + 228155022448185/2251799813685248
                          >> f9=subs(f6,y,10)
                          f9 =
                          cos(theta) - (450*cos((pi*(sin(theta) - 10))/(30*y0d))^2)/pi^2 + (33675*cos((pi*(sin(theta) - 10))/(30*y0d))^4)/pi^2 - (1003540*cos((pi*(sin(theta) - 10))/(30*y0d))^6)/pi^2 + (110648070*cos((pi*(sin(theta) - 10))/(30*y0d))^8)/(7*pi^2) - (1059908928*cos((pi*(sin(theta) - 10))/(30*y0d))^10)/(7*pi^2) + (6698244800*cos((pi*(sin(theta) - 10))/(30*y0d))^12)/(7*pi^2) - (205657459200*cos((pi*(sin(theta) - 10))/(30*y0d))^14)/(49*pi^2) + (13192663680*cos((pi*(sin(theta) - 10))/(30*y0d))^16)/pi^2 - (30287544320*cos((pi*(sin(theta) - 10))/(30*y0d))^18)/pi^2 + (51221643264*cos((pi*(sin(theta) - 10))/(30*y0d))^20)/pi^2 - (446093721600*cos((pi*(sin(theta) - 10))/(30*y0d))^22)/(7*pi^2) + (403234816000*cos((pi*(sin(theta) - 10))/(30*y0d))^24)/(7*pi^2) - (257540751360*cos((pi*(sin(theta) - 10))/(30*y0d))^26)/(7*pi^2) + (771049390080*cos((pi*(sin(theta) - 10))/(30*y0d))^28)/(49*pi^2) - (4043309056*cos((pi*(sin(theta) - 10))/(30*y0d))^30)/pi^2 + (471859200*cos((pi*(sin(theta) - 10))/(30*y0d))^32)/pi^2 - \\\r\n(x0d*(sin(theta) - 10))/y0d + 228155022448185/2251799813685248
                          >
                          IP属地:山东14楼2018-05-02 22:23
                          回复

                            y=10的分布
                            IP属地:山东15楼2018-05-02 22:27
                            收起回复

                              y=200
                              IP属地:山东16楼2018-05-02 22:59
                              回复

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