我是MatLab的超級初學者,我正在嘗試調試我正在編寫的一個簡單腳本。在嘗試調試我的代碼時出現奇怪的錯誤。這裏的腳本:爲什麼0 + 1 == 49?
function [prob] = QuantumHW1(j,k,m)
X = [0 1; 1 0];
Y = [0 -sqrt(-1); sqrt(-1) 0];
Z = [1 0; 0 -1];
H = 1/sqrt(2) * [1 1; 1 -1];
S = [1 0; 0 i];
T = [1 0; 0 exp(sqrt(-1)*pi/4)];
mats = {X,Y,Z,H,S,T};
binJ = dec2bin(j,k);
binM = dec2bin(m,k);
totOps = {};
%Set up all the operators to be used
for p = 1:k
totOps(p) = mats(mod(p,6));
if p == 0
totOps(p) = X;
end
end
withM = {};
%Dot product with M
for p = 1:k
p
binM(p)+1
totOps(:,1)
withM(p) = totOps(:,binM(p)+1);
end
rTotal = 0;
%Now take components with respect to J
for p = 1:k
rTotal = rTotal + [not(binJ(p)),binJ(p)] * withM(p);
end
prob = norm(runningTotal)^2;
disp('The probability to measure j = %d in a k = %d system on input m = %d is %d',j,k,m,prob);
end
當我運行程序時,我得到一個數組界限錯誤的指標就行了withM(p) = totOps(:,binM(p)+1);
。我試圖確保p的值是正確的。在for循環的第一次迭代中,binM(p)= 0。但是當我嘗試獲取binM(p)+1時,我得到了49.這太奇怪了。
任何幫助,非常感謝。我正在試圖弄清楚爲什麼會出現這種情況,我正在靠牆敲打我的頭。
+1有趣的問題。 :) – yuk 2012-02-14 16:22:31
標題是有點誤導。 – 2012-06-10 18:43:47