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錯誤使用 sym>convertChar (line 1548)
Character vectors and strings in the first argument can only specify
a variable or number. To evaluate character vectors and strings
representing symbolic expressions, use 'str2sym'.
出錯 sym>tomupad (line 1255)
S = convertChar(x);
出錯 sym (line 222)
S.s = tomupad(x);
出錯 Untitled3 (line 2)
f1=sym('exp(-0.5*t)*(heaviside(t)-heaviside(t-2))');
一直在報錯 想知道這個是什么意思
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