'All evaluations resulted in either an error or a complex result
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'All evaluations resulted in either an error or a complex result
I am getting error as 'All evaluations resulted in either an error or a complex result.
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Math Homework
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You have redefined x to become an array, between the definition of F(x) and the plot.
If you move the plot upper left corner to just above the redefinition of x to an array, your plot should show.
The error message "All evaluations..." is cryptic at first sight. In this case case 'all evaluations resulted in an error' applies, because you cannot compare a singular value (such as -1, 2 or 5 with an array (that you redefined x to).
Success!
Luc
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The definition of F(x) was not the cause of the problem of the OP.
He redefined x to be a 4 element array between the definition of F(x) and the plot (not shown in his picture). That would fail with your definition of F(x) as well.
Luc
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You're absolutely right. My answer is based on what the photo shows. Only now I have opened the file provided by FedexRight.
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Luc already explained why your plot failed - the definition of x as a vector.
Here are a few more suggestions and an explanation, why F(x) fails if x is a vector.
If you are new to this, I understand that the difference between a range and a vector can be quite confusing.
MC15 worksheet attached
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