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Make a loop in such way that i will be increasing by 5 from 4 up to 30 and by 3 from 30 till up to 50.

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nty huy
nty huy 2019-10-7
关闭： MATLAB Answer Bot 2021-8-20
im still confused on using while loops and if loops can someone help me with this question
  2 个评论
Rik
Rik 2019-10-7
It is extremely rude to edit away your question, especially if you received an answer from someone who took the time to read and understand your question and then spent time finding a solution and posting an answer. If you want private help, hire a consultant.

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回答（1 个）

Walter Roberson
Walter Roberson 2019-10-7
for VariableName = [4:5:30,30:3:50]
Note that in a case like this, you should always check in case you accidentally repeat a value. For example, [4:13:30, 30:3:50] would start [4, 17, 30] and then continue from [30 33 36 ...] . It so happens that 4:5:30 stops at 29 and so there is no duplication of 30.
  1 个评论
Walter Roberson
Walter Roberson 2019-10-7
for VariableName = [4:5:30,30:3:50]
something
end
is the same as
for VariableName = [4:5:30]
something
end
for VariableName = [30:3:50]
something
end
In turn,
for VARIABLENAME = FIRST_VALUE : INCREMENT : FINALVALUE
something
end
for positive increment is the same as (for your needs, but some of the details differ)
VARIABLENAME = FIRST_VALUE;
while VARIABLE_NAME <= FINALVALUE
something
VARIABLENAME = VARIABLENAME + INCREMENT;
end
So you can simply write two while loops in a row.
However, you can also code something like,
VARIABLENAME = FIRST_VALUE;
first_phase = true;
while VARIABLE_NAME <= FINALVALUE
something
if first_phase
VARIABLENAME = VARIABLENAME + FIRSTINCREMENT;
if VARIABLENAME > BREAKPOINT
VARIABLENAME = BREAKPOINT;
first_phase = false;
end
else
VARIABLENAME = VARIABLENAME + SECONDINCREMENT;
end
end

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