21 lines
527 B
Zig
21 lines
527 B
Zig
const std = @import("std");
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pub fn main() !void {
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const stdout = std.io.getStdOut().writer();
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const arr = [_]f32{ 2, 4, 4, 4, 5, 5, 7, 9 };
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var sum: f32 = 0;
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var sum2: f32 = 0;
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var count: f32 = 0;
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for (arr) |n| {
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sum += n;
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sum2 += std.math.pow(f32, n, 2);
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count += 1;
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const cumulative: f32 = count * sum2 - std.math.pow(f32, sum, 2);
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const running_sd: f32 = std.math.sqrt(cumulative) / count;
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try stdout.print("{d} {d}\n", .{n, running_sd});
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}
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}
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