fitme 1.1.0

CLI curve fitting tool. Parameterise an equation from a CSV dataset.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

use assert_cmd::Command;

fn cmd() -> Command {
    Command::cargo_bin(env!("CARGO_PKG_NAME")).unwrap()
}

#[test]
fn no_args() {
    cmd().assert().failure().stderr(
        "\
error: the following required arguments were not provided:
  <TARGET>
  <EXPR>

Usage: fitme <TARGET> <EXPR> [DATA]

For more information, try \'--help\'.
",
    );
}

#[test]
fn target_not_found() {
    cmd()
        .arg("y_")
        .arg("m * x + c")
        .arg("tests/file1.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file1.csv\'
  ├─▶ help - these headers are similar: y
  ╰─▶ could not find column \'y_\' in headers

",
        );

    cmd()
        .arg("a space ")
        .arg("m * x + c")
        .arg("tests/file1.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file1.csv\'
  ├─▶ help - these headers are similar: aSpacecol
  ╰─▶ could not find column \'a space \' in headers

",
        );
}

#[test]
fn file_not_found() {
    cmd()
        .arg("y")
        .arg("m * x + c")
        .arg("not-here")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × failed to open \'not-here\'
  ╰─▶ No such file or directory (os error 2)

",
        );
}

#[test]
fn matching_column_name() {
    cmd()
        .arg("aSpaceCol")
        .arg("10 - x - y + FOO")
        .arg("tests/file1.csv")
        .assert()
        .success()
        .stdout(
            "\
───────────────────────────────────────────────
 Parameter   Value    Standard Error   t-value 
═══════════════════════════════════════════════
 FOO         -1.024            1.641    -0.624 
───────────────────────────────────────────────
  Number of observations: 10.0
  Root Mean Squared Residual error: 5.191
  R-sq Adjusted: 0.243
",
        );
}

#[test]
fn zero_params() {
    cmd()
        .arg("y")
        .arg("2 * x")
        .arg("tests/file1.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file1.csv\'
  ├─▶ supplied expr: 2 * x
  ├─▶ equation must have a least one variable which does not match a column
  │   header
  ╰─▶ equation has 0 parameters to fit

",
        );
}

#[test]
fn invalid_expr() {
    cmd()
        .arg("y")
        .arg("3 * 2x +")
        .arg("tests/file1.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file1.csv\'
  ├─▶ parsing \'3 * 2x +\' failed
  ╰─▶ Parse error: Unexpected token at byte 5.

",
        );
}

#[test]
fn invalid_csv() {
    cmd()
        .arg("y")
        .arg("3 * 2 * x + b")
        .arg("tests/file2.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file2.csv\'
  ├─▶ in row index 2
  ├─▶ in column index 1
  ╰─▶ failed to parse \'bar\' as number

",
        );
}

#[test]
fn supported_math() {
    cmd()
        .arg("y")
        .arg("sin(x) + ln(x) + cos(x) + tan(x) + log(x) + sqrt(x) + exp(x) + abs(x)")
        .arg("tests/file1.csv")
        .assert()
        .failure()
        .stderr(
            "\
Error:   × in \'tests/file1.csv\'
  ├─▶ supplied expr: sin(x) + ln(x) + cos(x) + tan(x) + log(x) + sqrt(x) +
  │   exp(x) + abs(x)
  ├─▶ equation must have a least one variable which does not match a column
  │   header
  ╰─▶ equation has 0 parameters to fit

",
        );
}