Conversion from char data type to double

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Amit Mishra
Amit Mishra 2015-10-28
评论： Walter Roberson 2015-10-31
I converted a data [0.104895105] from double to binary[0001]. But this binary data is in char form as in excel it shows like '0001'.
1. Is it possible to convert back to double data type without loosing any thing?
2. is it possible to remove ' ' from the data? Thanks in Advance.
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Amit Mishra
Amit Mishra 2015-10-31
Dear James Tx so much i used my own function to do that. may problem is how to convert char data back to number or double. tx
Walter Roberson
Walter Roberson 2015-10-31
Suppose I have a function that converts the value -2 to the value 4. I do not tell you what the function is. I ask you to convert the value 4 back to -2 without seeing my function. Can you do it?
Answer: No. There are an infinite number (Aleph 1) of functions that happen to map -2 to 4. One of them is f(x) = x^2. But that function also maps +2 to 4, so given only the value 4 there is no way to invert that function to get -2 unambiguously.

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回答（1 个）

Walter Roberson
Walter Roberson 2015-10-29
编辑：Walter Roberson 2015-10-29
Subtract '0' from the array. That is '0' not 0
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Amit Mishra
Amit Mishra 2015-10-29
编辑：Amit Mishra 2015-10-29
@walter Thanks . but why the data is coming into four columns . they are not together. Is it possible to keep them together like 0000 .kindly help
Walter Roberson
Walter Roberson 2015-10-29
You want a numeric data type holding 4 distinguishable locations. In MATLAB, all numeric data types are displayed with whitespace between locations by any of the routines that do automatic formatting.
As far as I understand, Excel has no way of holding multiple numeric values in a single cell.

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