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Why am I getting an error message on my code?

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Ilvar
Ilvar 2023-3-22
评论： VBBV 2023-3-23
function [estPiAve, estPiStD] = estPiStats(numThrows,numTrials)
estPiValues = zeros([numTrials 1]);
% populate the estPiValues vector
for i = 1:numTrials
estPiValues(i) = estPi(numThrows);
end
estPiAve = mean(estPiValues);
estPiStD = std(estPiValues);
plot(estPiValues,'o')
hold on
plot([1, numTrials], pi^[-1, 1],'k');
plot([1, numTrials], (estPiAve+1.96^estPiStD)^[-1, 1],'--k');
plot([1, numTrials], (estPiAve-1.96^estPiStD)^[-1, 1]),'--k';
hold off
end
Not enough input arguments.
Error in estPiStats (line 3)
estPiValues = zeros([numTrials 1]);

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回答（2 个）

Cameron
Cameron 2023-3-22
Try this instead
estPiValues = zeros(numTrials,1);
VBBV
VBBV 2023-3-23
Ran in:
numThrows = 10;
numTrials = 30;
[estPiAve, estPiStD] = estPiStats(numThrows,numTrials) % provide all input arguments when calling function
estPiAve = 0.5101
estPiStD = 0.2798
function [estPiAve, estPiStD] = estPiStats(numThrows,numTrials)
estPiValues = zeros([numTrials 1]);
% populate the estPiValues vector
for i = 1:numTrials
estPiValues(i) = rand(1); %estPi(numThrows);
end
estPiAve = mean(estPiValues);
estPiStD = std(estPiValues);
plot(estPiValues,'o')
hold on
plot([1, numTrials], pi.^[-1, 1],'k');
plot([1, numTrials], (estPiAve+1.96^estPiStD).^[-1, 1],'--k');
plot([1, numTrials], (estPiAve-1.96^estPiStD).^[-1, 1]),'--k';
hold off
end
  1 个评论
VBBV
VBBV 2023-3-23
Ran in:
if you dont provide all input arguments to the function, then it results in such error
numThrows = 10;
numTrials = 30;
[estPiAve, estPiStD] = estPiStats(numThrows) % if you dont provide enough input arguments it will throw such error
Not enough input arguments.

Error in solution>estPiStats (line 5)
estPiValues = zeros([numTrials 1]);
function [estPiAve, estPiStD] = estPiStats(numThrows,numTrials)
estPiValues = zeros([numTrials 1]);
% populate the estPiValues vector
for i = 1:numTrials
estPiValues(i) = rand(1); %estPi(numThrows);
end
estPiAve = mean(estPiValues);
estPiStD = std(estPiValues);
plot(estPiValues,'o')
hold on
plot([1, numTrials], pi.^[-1, 1],'k');
plot([1, numTrials], (estPiAve+1.96^estPiStD).^[-1, 1],'--k');
plot([1, numTrials], (estPiAve-1.96^estPiStD).^[-1, 1]),'--k';
hold off
end

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