selecting only the numbers from a string variable
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Dear all,
I have
A={'BARI 500G' ...
'DUR NOR 18CONmS' ...
'SENSO NORM ST-TUB 75ML '...
'MARL 100S 20CIG'...
'BI BOY WHI RMAL DU NA 15 SK'...
'REGU KR GRA ME FAMIAL 1000 ST GRND'
};
I was wondering if there is a way to choose the numbers from A. In case i have 2 numbers in a string I want to select the second one
For instance,
B=[500 18 78 20 15 1000]
5 个评论
antonet
2012-7-10
antonet
2012-7-10
Tom
2012-7-10
Num = regexp(A,'\d') tells you where the digits are, but you'll have to do some work to make those into numbers- for example '1000' will come up as 4 results are there are 4 digits, even though they make one number
antonet
2012-7-10
Luffy
2012-7-10
@Antonet: Do you need those numbers as a vector??
采纳的回答
Tom
2012-7-10
B = regexp(A,'\d*','Match');
returns one result for each number found in each string. You will then have to get the last value of each cell and convert it to an array (using str2double)
更多回答（2 个）
GS76
2020-10-26
0 个投票
To whom it may concern:
I have the numbers below in a 1x1 string. How do I seperate them into seperate rows or columns? I want all the numbers between ";" (semi-colons).
Any assistance would be greatly appreciated.
0.0;0.005;0.01;0.015;0.02;0.025;0.03;0.035;0.04;0.045;0.05;0.055;0.06;0.065;0.07;0.075;0.08;0.085;0.09;0.095;0.1;0.105;0.11;0.115;0.12;0.125;0.13;0.135;0.14;0.145;0.15;0.155;0.16;0.165;0.17;0.175;0.18;0.185;0.19;0.195;0.2;0.205;0.21;0.215;0.22;0.225;0.23;0.235;0.24;0.245;0.25;0.255;0.26;0.265;0.27;0.275;0.28;0.285;0.29;0.295;0.3;0.305;0.31;0.315;0.32;0.325;0.33;0.335;0.34;0.345;0.35;0.355;0.36;0.365;0.37;0.375;0.38;0.385;0.39;0.395;0.4;0.405;0.41;0.415;0.42;0.425;0.43;0.435;0.44;0.445;0.45;0.455;0.46;0.465;0.47;0.475;0.48;0.485;0.49;0.495;0.5;0.505;0.51;0.515;0.52;0.525;0.53;0.535;0.54;0.545;0.55
6 个评论
Stephen23
2020-10-26
>> str = '0.0;0.005;0.01;0.015;0.02;0.025;0.03;0.035;0.04;0.045;0.05;0.055;0.06;0.065;0.07;0.075;0.08;0.085;0.09;0.095;0.1;0.105;0.11;0.115;0.12;0.125;0.13;0.135;0.14;0.145;0.15;0.155;0.16;0.165;0.17;0.175;0.18;0.185;0.19;0.195;0.2;0.205;0.21;0.215;0.22;0.225;0.23;0.235;0.24;0.245;0.25;0.255;0.26;0.265;0.27;0.275;0.28;0.285;0.29;0.295;0.3;0.305;0.31;0.315;0.32;0.325;0.33;0.335;0.34;0.345;0.35;0.355;0.36;0.365;0.37;0.375;0.38;0.385;0.39;0.395;0.4;0.405;0.41;0.415;0.42;0.425;0.43;0.435;0.44;0.445;0.45;0.455;0.46;0.465;0.47;0.475;0.48;0.485;0.49;0.495;0.5;0.505;0.51;0.515;0.52;0.525;0.53;0.535;0.54;0.545;0.55';
>> vec = sscanf(str,'%f;')
vec =
0.00000
0.00500
0.01000
0.01500
0.02000
0.02500
0.03000
0.03500
0.04000
0.04500
0.05000
0.05500
... more lines here
0.51500
0.52000
0.52500
0.53000
0.53500
0.54000
0.54500
0.55000
Akira Agata
2020-10-26
Another solution:
str = '0.0;0.005;0.01;0.015;0.02;0.025;0.03;0.035;0.04;0.045;0.05;0.055;0.06;0.065;0.07;0.075;0.08;0.085;0.09;0.095;0.1;0.105;0.11;0.115;0.12;0.125;0.13;0.135;0.14;0.145;0.15;0.155;0.16;0.165;0.17;0.175;0.18;0.185;0.19;0.195;0.2;0.205;0.21;0.215;0.22;0.225;0.23;0.235;0.24;0.245;0.25;0.255;0.26;0.265;0.27;0.275;0.28;0.285;0.29;0.295;0.3;0.305;0.31;0.315;0.32;0.325;0.33;0.335;0.34;0.345;0.35;0.355;0.36;0.365;0.37;0.375;0.38;0.385;0.39;0.395;0.4;0.405;0.41;0.415;0.42;0.425;0.43;0.435;0.44;0.445;0.45;0.455;0.46;0.465;0.47;0.475;0.48;0.485;0.49;0.495;0.5;0.505;0.51;0.515;0.52;0.525;0.53;0.535;0.54;0.545;0.55';
vec = split(str,';');
vec = str2double(vec);
GS76
2020-10-26
Thank you Akira, much appreciated!
GS76
2020-10-26
Thank you Stephen, much appreciated!
Rik
2020-10-26
Adding a clarification: you don't even need to cast the string to a char, either solution can handle strings as well.
GS76
2020-10-26
Thank you Rik. This is an important point.
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