Question

我需要帮助简化这个嵌套parfor和for循环，其中vars，mats和数组是： Y是5000 x 147矩阵， numProperties是5000， PaymentTable是54000 x 4矩阵， boolFlag是5000个数组， LookUpID是5000个数组， numPeriods是5000个数组， PaymentType是5000个单元阵列

Y = cell2mat(Y);
Y = [zeros(numProperties,1) Y(:,5:end) zeros(numProperties,4)];
for idx=1:numProperties;
    maxPeriod=numPeriods(idx)+1;
    parfor jdx=2:maxPeriod;
        for kdx=1:size(PaymentTable);
            if boolFlag(idx)==1 && LookUpID(idx)==PaymentTable(kdx,2) && PaymentTable(kdx,4)~=0 && PaymentTable(kdx,3)==jdx-1 && Y(idx,jdx)==0;
                if PaymentTable(kdx,1)==2 && strcmp(PaymentType(idx),'Slow');
                    NonQuickRepayments(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==2 && strcmp(PaymentType(idx),'Quick');
                    QuickRepayments(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==3;
                    MoneyFlows(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==4;
                    Outstanding(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==5;
                    IntrinsicValue(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==6;
                    OtherValue(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==7;
                    ForexAdjustment(idx,jdx)=PaymentTable(kdx,4);
                elseif PaymentTable(kdx,1)==8;
                    BalanceToDispose(idx,jdx)=-PaymentTable(kdx,4)+BalanceToDispose(idx,jdx);
                elseif PaymentTable(kdx,1)==9;
                    BalanceToDispose(idx,jdx)=-PaymentTable(kdx,4)+BalanceToDispose(idx,jdx);
                elseif PaymentTable(kdx,1)==10;
                    BalanceToDispose(idx,jdx)=-PaymentTable(kdx,4)+BalanceToDispose(idx,jdx);
                elseif PaymentTable(kdx,1)==11;
                    BalanceToDispose(idx,jdx)=-PaymentTable(kdx,4)+BalanceToDispose(idx,jdx);
                end;
            end;
        end;
    end;
end;

Answer 1

我没有看到简化for循环的方法。代码看起来不像是矢量化的，如果要枚举三个变量，则需要三个循环。

您可以简化长if/elseif语句;请改用switch。此外，案例8至11做同样的事情。

        switch PaymentTable(kdx,1)
            case 2
                if strcmp(PaymentType(idx),'Slow');
                    NonQuickRepayments(idx,jdx)=PaymentTable(kdx,4);
                elseif strcmp(PaymentType(idx),'Quick');
                    QuickRepayments(idx,jdx)=PaymentTable(kdx,4);
                end
            case 3
                MoneyFlows(idx,jdx)=PaymentTable(kdx,4);
            case 4
                Outstanding(idx,jdx)=PaymentTable(kdx,4);
            case 5
                IntrinsicValue(idx,jdx)=PaymentTable(kdx,4);
            case 6
                OtherValue(idx,jdx)=PaymentTable(kdx,4);
            case 7
                ForexAdjustment(idx,jdx)=PaymentTable(kdx,4);
            case {8, 9, 10, 11}
                BalanceToDispose(idx,jdx)=-PaymentTable(kdx,4)+BalanceToDispose(idx,jdx);
            end
        end

为Matlab并行化并行嵌套for循环

1 个答案: