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WOADD

гæ (ÕýʽдÊÖ)

[ÇóÖú] matlab³ÌÐòÇóÖú ÒÑÓÐ2È˲ÎÓë

load('data.mat')
a=zeros(24,1);
daynum = datenum(data(:,1),data(:,2),data(:,3));
ind = find(daynum>=datenum(1960,7,1) & daynum<datenum(1960,8,1)); %¶ÁÈ¡ÕâÒ»¸öÔÂÊý¾Ý
month_data = data(ind,4:27);
med = median(month_data,1);  %ÇóÔÂÖÐÖµ
storm_ind = find(daynum==datenum(1960,7,16));  %¶ÁÈ¡´Å±©Ê±Êý¾Ý
a = data(storm_ind,4:27);
med(med==0)=nan;     %ÈôֵΪ0ÔòÈ¥µô¸Ãµã
a(a==0)=nan;
for t=1
    if  (any((a-med)/med>=0.15||(a-med)/med<=-0.15))    %ÒªÇó±ä»¯´óÓÚ15%
        t=t+1;
        if t>=4        %ÒªÇóʱ¼ä³ÖÐøËĸöСʱ
            plot(med,'b-o');
            hold on
            plot (a,'r-*');
            xlabel('LT','FontSize',15);
            ylabel('NmF2','FontSize',15);
            title('1960Äê7ÔÂ16ÈÕ','FontSize',20);
            set(gca,'XLim',[0,24]);
            set(gca,'XTick',(0:6:24));
            set(gca,'XTickLabel',{'00:00','06:00','12:00','18:00','24:00'});
            set(gca,'YLim',[0,16]);
            legend('ÔÂÖÐÖµ','7ÔÂ16ÈÕ')
        else

        end
    end
end
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ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

WOADD

гæ (ÕýʽдÊÖ)

2Â¥2016-12-11 13:36:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

chendequan

Ìú³æ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
½¨ÒéÉÏ´« data.matÎļþ
QQ£º516477448£¬ÕæÐİïÖú½â¾öMATLABÏà¹ØÎÊÌ⣬ÌṩÏêϸ×ÊÁÏ£¬WordÎĵµÃ÷È·¾ßÌåÎÊÌâ¼°ÒªÇ󣬾¡Á¦¶øÎª£¡
3Â¥2016-12-11 18:21:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

FMStation

ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
https://www.mathworks.com/help/matlab/ref/for.html
CODE:
s = 10;
H = zeros(s);

for c = 1:s
    for r = 1:s
        H(r,c) = 1/(r+c-1);
    end
end

for v = 1.0:-0.2:0.0
   disp(v)
end

for v = [1 5 8 17]
   disp(v)
end

for I = eye(4,3)
    disp('Current unit vector:')
    disp(I)
end

https://www.mathworks.com/help/matlab/ref/if.html
CODE:
for c = 1:ncols
    for r = 1:nrows

        if r == c
            A(r,c) = 2;
        elseif abs(r-c) == 1
            A(r,c) = -1;
        else
            A(r,c) = 0;
        end

    end
end
A



limit = 0.75;
A = rand(10,1)

if any(A > limit)
    disp('There is at least one value above the limit.')
else
    disp('All values are below the limit.')
end

4Â¥2016-12-11 21:21:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

WOADD

гæ (ÕýʽдÊÖ)

ÒýÓûØÌû:
4Â¥: Originally posted by FMStation at 2016-12-11 21:21:49
https://www.mathworks.com/help/matlab/ref/for.html

s = 10;
H = zeros(s);

for c = 1:s
    for r = 1:s
        H(r,c) = 1/(r+c-1);
    end
end

for v = 1.0:-0.2:0.0
   disp(v)
end

for ...

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5Â¥2016-12-11 21:38:58
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