MATLAB COMPILER RELEASE NOTES User's Guide download pdf (Page 71)

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Data Import and Export

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textscan and readtable Functions: Return consistent results when

reading quoted strings

As of R2014b, using the %q format specifier with the textscan and readtable

functions returns consistent results. When using %q to read strings that begin with

a double quotation mark ("), textscan and readtable remove the leading double

quotation mark and its accompanying closing mark. The closing mark is the second

instance of a lone, unescaped double quotation mark. The functions replace escaped

double quotation marks (for example, ""abc"") with lone double quotation marks

("abc"). The textscan and readtable functions ignore any double quotation marks

that follow the closing mark.

In R2014a and earlier, the textscan and readtable functions return unpredictable

results when reading strings with extraneous double quotation marks. This behavior can

occur when you use the %q format specifier or if you do not specify a value for the Format

name-value pair argument to readtable.

For example, these commands:

C = textscan('"Alvin ""Al"" Smith"','%q','Delimiter',',');

C1 = C{:}

D = textscan('"Alvin" "Al" Smith"','%q','Delimiter',',');

D1 = D{:}

E = textscan('"Alvin ""Al"" Smith" and Brian"""Jones','%q','Delimiter',',');

E1 = E{:}

now return:

C1 =

'Alvin "Al" Smith'

D1 =

'Alvin "Al" Smith"'

E1 =

'Alvin "Al" Smith and Brian"""Jones'

In R2014a and earlier, the same commands return:

C1 =

'Alvin "Al" Smith'

D1 =

'Alvin "Al Smith"'

E1 =

'Alvin "Al" Smith and Brian""Jones'

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